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Maemichi T, Kumai T. Long-Term Injury Survey in a Japanese University Women's Soccer Team. Int J Sports Phys Ther 2025; 20:572-582. [PMID: 40182908 PMCID: PMC11964693 DOI: 10.26603/001c.132248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Accepted: 01/19/2025] [Indexed: 04/05/2025] Open
Abstract
BACKGROUND Injuries are common in soccer as it is a contact sport. However, longitudinal studies spanning multiple seasons, focused on injuries in female university soccer players in Japan, are lacking. Additionally, broader comparisons on injury patterns remain unexplored. The purpose of this study was to prospectively investigate injuries among female university soccer players over three seasons. STUDY DESIGN Descriptive epidemiological study. METHODS A total of 108 players from a university women's soccer team were included. A qualified athletic trainer assessed injury type (injury or disability), site and severity according to injury occurrence (game or practice) over three seasons. An orthopedic surgeon confirmed the resulting injury. RESULTS The overall injury rate was 1.62/1000 athlete exposures. The game injury rate (9.86/1000 athlete exposures) was higher than the practice injury rate (1.39/1000 athlete exposures). Sprains were the most common injury in games and practices; concussions and meniscal tears were also common during games. The lower limbs, particularly the ankles and feet, were the most common anatomical injury sites in both games and practices. Severe injuries requiring long-term withdrawal were frequently observed during games and practices. These included anterior cruciate ligament (ACL) tears, meniscal injuries, and severe concussions, all of which necessitated prolonged recovery periods and withdrawal from team activities. CONCLUSION Injury prevention measures should be prioritized for female university soccer players, especially to address the high injury rate during games and the frequent occurrence of severe injuries. LEVEL OF EVIDENCE 3b.
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Affiliation(s)
- Toshihiro Maemichi
- Faculty of Sport SciencesWaseda University
- Institute of Life Innovation StudiesToyo University
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2
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Babler F, Gaetke-Udager K, Crawford EA, Yablon CM. Imaging of soccer injuries in adolescent female athletes. Skeletal Radiol 2025; 54:743-762. [PMID: 38478081 DOI: 10.1007/s00256-024-04629-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 01/21/2024] [Accepted: 02/16/2024] [Indexed: 02/22/2025]
Abstract
Soccer participation is increasing among female adolescents with a concomitant rise of injuries in this group. Age- and sex-related factors, such as the transition from skeletal immaturity to skeletal maturity as well as anatomic, physiologic, neuromuscular, and behavioral differences between females and males, all play a role in injury patterns for these athletes. Anterior cruciate ligament (ACL) tears in this group have received a great deal of attention in the medical literature and the media in recent years with increasing knowledge about causative factors, surgical management, and injury prevention. There have been fewer studies specifically focused on female adolescent soccer players in relation to other types of injuries, such as patellar dislocation/instability; other knee and ankle ligament tears; hip labral tears; muscle strains and tears; and overuse injuries such as apophysitis, patellofemoral pain syndrome, and bone stress injuries. Because imaging plays a critical role in diagnosis of soccer-related injuries in female adolescents, knowledge of the mechanisms of injury, imaging findings, and clinical considerations are essential for radiologists involved in the care of these patients.
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Affiliation(s)
- Fernanda Babler
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
| | | | - Eileen A Crawford
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Corrie M Yablon
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
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Kennedy D, Casebolt JB, Farren GL, Fiaud V, Bartlett M, Strong L. Electromyographic differences of the gluteus maximus, gluteus medius, biceps femoris, and vastus lateralis between the barbell hip thrust and barbell glute bridge. Sports Biomech 2024; 23:2935-2949. [PMID: 35586943 DOI: 10.1080/14763141.2022.2074875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 05/03/2022] [Indexed: 10/18/2022]
Abstract
Hip extensor muscles are critical to sport performance as events requiring sprinting and forceful landings are highly dependent on these muscles. Despite biomechanical differences between the barbell hip thrust (BHT) and the barbell glute bridge (BGB), both are biomechanically efficient ways to load this musculature for training purposes. Research investigating the differences in muscular activity between the BHT and BGB has yet been conducted. The aim of this study was to investigate, through surface electromyography, if one exercise is more optimal than the other in producing greater muscle activation for specific hip extensor muscles. Ten male participants completed a two-part study protocol. Results revealed the BHT elicited significantly greater muscle activity within the vastus lateralis for peak and mean outcomes; however, the BGB elicited significantly greater muscle activity in the upper and lower gluteus maximus for peak and mean outcomes and mean outcome in the gluteus medius. Current findings suggest, the BGB is, at minimum, a superior substitute for the BHT for eliciting a larger magnitude of activity in the gluteus maximus. Future studies between the two exercises are warranted to discern which produces greater hypertrophy and whether adaption of the BHT or BGB transfers more optimally to sport performance.
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Affiliation(s)
- D Kennedy
- Department of Sports and Exercise Sciences, West Texas A&M University, Canyon, TX, USA
| | | | - G L Farren
- Department of Sports and Exercise Sciences, West Texas A&M University, Canyon, TX, USA
| | - V Fiaud
- Department of Sports and Exercise Sciences, West Texas A&M University, Canyon, TX, USA
| | - M Bartlett
- Department of Sports and Exercise Sciences, West Texas A&M University, Canyon, TX, USA
| | - L Strong
- Department of Sports and Exercise Sciences, West Texas A&M University, Canyon, TX, USA
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Feria-Madueño A, Hewett T, Dos'Santos T, Sañudo B. The Effects of a 12-Week Training Multicomponent Exercise Program on Landing Mechanics in Recreational Athletes. Healthcare (Basel) 2024; 12:2327. [PMID: 39684948 DOI: 10.3390/healthcare12232327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2024] [Revised: 11/13/2024] [Accepted: 11/15/2024] [Indexed: 12/18/2024] Open
Abstract
BACKGROUND/OBJECTIVES This study investigated the impacts of a 12-week training program on kinetic parameters during landings in non-professional recreational athletes. METHODS Fifty-seven non-elite recreational athletes performed three unilateral-landing trials from a 30 cm high structure on a force platform. The following outcome measures were analyzed: the ground reaction forces at initial ground contact (PF1) and the highest value (PF2), impulse (change in the moment of force during landing), stabilization time, and ankle and knee accelerations. The ground reaction forces, momentum, and accelerations were evaluated in the vertical, medio-lateral, and anteroposterior axes. Participants were randomly assigned to two groups. The experimental group (EG) underwent a 12-week intervention, three times per week, consisting of various exercises, such as strength, eccentric, proprioceptive, whole-body vibration (WBV), and neuromuscular exercises. After 12 weeks, the same outcome measures were analyzed. RESULTS The effects of the training program on vertical ground reaction forces were not clear (0.3% and 0.9%, respectively). Medio-lateral (64.8%, d = 0.51) and anteroposterior (43.9%, d = 1.34) forces were probably reduced due to the training program. The stabilization time was also reduced in the experimental group (44.2%). The training program most likely decreased the vertical impulse (47.3%, d = -1.56), whereas the total ankle acceleration increased (18.4%, d = 0.79). CONCLUSIONS The findings reveal significant improvements in neuromuscular control and stability during landings, specifically demonstrating reduced medio-lateral forces, vertical momentum, and acceleration during monopodal landings. This study focuses on the importance of proper landing techniques in minimizing the risk of knee injuries, emphasizing the falling strategy's role in injury prevention.
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Affiliation(s)
- Adrián Feria-Madueño
- Department of Physical Education and Sport, University of Seville, 41013 Sevilla, Spain
| | - Timothy Hewett
- Department of Orthopedics, Marshall University Biomechanics Laboratories and Sports Medicine Research, Marshall University, Huntington, WV 25755, USA
| | - Thomas Dos'Santos
- Department of Sport and Exercise Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Manchester M15 6BX, UK
| | - Borja Sañudo
- Department of Physical Education and Sport, University of Seville, 41013 Sevilla, Spain
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Gu Q, Pan L, Yu L, Jiang Q. Effect of scapular posterior tilting exercise on scapular muscle activities in men and women with a rounded shoulder posture. J Orthop Surg Res 2024; 19:383. [PMID: 38943153 PMCID: PMC11214228 DOI: 10.1186/s13018-024-04810-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 05/23/2024] [Indexed: 07/01/2024] Open
Abstract
Round-shoulder posture (RSP) is a common postural condition, characterized by protraction, downward rotation, anterior tilting and internal rotation of the scapula. RSP can lead to shoulder dysfunction. Different methods have been proposed for rehabilitating and correcting the altered posture in RSP including stretching, strengthening exercises, and shoulder brace or taping. However, the findings are controversial and studies are ongoing to develop more effective method. The present study is aimed at investigating the effects of scapular posterior tilting (SPT) exercise in different support positions on scapular muscle activities in men and women with RSP. In a prospective observational clinical study, we assessed demographic, basic clinical parameters and study variables of the subjects with RSP (n = 20) (men/women = 9/11) attending Daegu University in Gyeongsan, South Korea. To do so, we compared electromyographic (EMG) activities of lower trapezius and serratus anterior muscles between men and women with RSP during SPT exercise on four different support surfaces to determine any difference in the EMG activities. The results revealed that women showed significant differences in EMG activities in the lower and left upper trapezius and serratus anterior muscles, while men showed significant differences in EMG activity only in the lower trapezius muscle during SPT exercise on four different surfaces (P < 0.05). The post-hoc analysis revealed significantly greater EMG activity values in the lower trapezius and serratus anterior muscles during SPT exercise on the upper body unstable surface and whole-body unstable surface (p < 0.05). Independent t-tests after the Bonferroni correction showed no significant differences in muscle activities between men and women on the four different surfaces (p > 0.0125).
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Affiliation(s)
- Qian Gu
- Department of Rehabilitation, Affiliated Hospital of Nantong University, No. 20. Xisi Road, Nantong, 226001, China
| | - Longlu Pan
- The Rehabilitation Department of Affiliated Nantong Hospital of Shanghai University (The Rehabilitation Department of Sixth People's Hospital of Nantong), Nantong, 226011, China
| | - Lijun Yu
- Department of Clinical Medicine, Suzhou Vocational Health College, Suzhou, 215009, China
| | - Qin Jiang
- Outpatient Department, Affiliated Hospital of Nantong University, No. 20. Xisi Road, Nantong, 226001, China.
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Carvalho C, Viadanna Serrão F, Felipe Martinez A, Da Silva Serrão PRM. Three-dimensional kinematics of the trunk, pelvis, hip, and knee during the single-leg squat and hip torque in subjects with isolated patellofemoral osteoarthritis compared to individually matched controls: Preliminary results. Arch Rheumatol 2024; 39:33-45. [PMID: 38774690 PMCID: PMC11104754 DOI: 10.46497/archrheumatol.2024.9814] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 03/22/2023] [Indexed: 05/24/2024] Open
Abstract
Objectives: This study aimed to compare three-dimensional kinematic of the trunk, pelvis, hip, and knee during the single-leg squat and hip torque in individuals with and without isolated patellofemoral osteoarthritis (PFOA). Patients and methods: This cross-sectional study evaluated trunk, pelvis, hip, and knee kinematics at 30°, 45°, and 60° knee flexion during the single-leg squat using the Vicon motion capture and analysis system, the Nexus System 2.1.1, and 3D Motion Monitor software. Sixteen individuals (8 males, 8 females; mean age: 49.3±6.2 years; range 40 to 61 years) participated in the study, of which eight were PFOA patients and eight were healthy controls. Isometric hip abductor, extensor, and external rotator torques were evaluated using a handheld dynamometer. Results: The PFOA group exhibited greater hip adduction at 30° (p=0.008), 45° (p=0.005), and 60° (p=0.008) knee flexion in the descending phase of the single-leg squat, as well as at 60° (p=0.009) and 45° (p=0.03) knee flexion in the ascending phase. No significant differences were found between groups for other kinematic variables (p>0.05). The PFOA group exhibited lower isometric hip abductor (p=0.02), extensor (p <0.001), and external rotator (p=0.007) torques. Conclusion: Individuals with PFOA exhibited excessive hip adduction that could increase stress on the lateral patellofemoral joint at 30°, 45°, and 60° knee flexion during the single-leg squat and exhibited weakness of the hip abductors, extensors, and external rotators in comparison to healthy controls.
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Affiliation(s)
- Cristiano Carvalho
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Fábio Viadanna Serrão
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
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Rauseo ML, Feairheller DL, LaRoche DP, Cook SB. Acute Effect of Dynamic and Gluteal Resistance Exercise Warm-up Protocols on Jump Landing Mechanics in College-Aged Females. J Strength Cond Res 2024; 38:259-265. [PMID: 37815265 DOI: 10.1519/jsc.0000000000004618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
ABSTRACT Rauseo, ML, Feairheller, DL, LaRoche, DP, and Cook, SB. Acute effect of dynamic and gluteal resistance exercise warm-up protocols on lower-extremity jump landing mechanics in college-aged females. J Strength Cond Res 38(2): 259-265, 2024-Inadequate neuromuscular control of the femur by the gluteal musculature is associated with noncontact and overuse injuries to the knee. Acute bouts of resistance exercises targeting the gluteal musculature can be prescribed as part of a warm-up protocol with the goal of improving subsequent neuromuscular control and performance. The purpose of this study was to determine the effect that a warm-up protocol including moderate-intensity gluteal resistance exercises (GRE) has on single leg jump landing biomechanics. Seventeen healthy, college-aged, recreationally active females (mean ± SD ; age = 21.4 ± 1.9 years; height = 166.9 ± 5.7 cm; body mass = 62.5 ± 7.4 kg) performed 3 single leg hop trials per leg after completing no warm-up (CON), a dynamic warm-up (DWU), and a dynamic warm-up with gluteal resistance exercises (DWU + GRE) across 3 laboratory visits. Lower extremity kinetic and kinematic variables were assessed during single leg hops from the point of initial foot contact to deepest knee flexion. Biomechanical differences between dominant and nondominant limb landings were also assessed. Dominant limb hip internal rotation angle after DWU + GRE (2.03 ± 9.92°) was significantly greater ( p ≤ 0.05) compared with CON (-3.36 ± 7.74°). Peak knee adduction moment (56.8%), peak knee flexion angle (5.7%), and peak knee external rotation angle (17.0%) were significantly greater ( p ≤ 0.017) in the dominant limb, compared with the nondominant limb, across warm-up protocols. The combined DWU + GRE warm-up protocol did not have a substantial impact on landing biomechanics. Clinicians prescribing GRE before activity should not expect significant changes in movement patterns after a single bout.
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Affiliation(s)
- Matthew L Rauseo
- Biomechanics and Motor Control Laboratory, Department of Kinesiology, University of New Hampshire, Durham, New Hampshire
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Dennis JD, Choe KH, Montgomery MM, Lynn SK, Crews BM, Pamukoff DN. Lower extremity and trunk sagittal plane coordination strategies and kinetic distribution during landing in males and females. J Sports Sci 2024; 42:169-178. [PMID: 38423997 DOI: 10.1080/02640414.2024.2323857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 02/20/2024] [Indexed: 03/02/2024]
Abstract
Force attenuation during landing requires coordinated motion of the ankle, knee, hip, and trunk, and strategies may differ between sexes. Sagittal plane coordination of the ankle/knee, knee/hip, and knee/trunk, and lower extremity and trunk kinematics and kinetics was compared throughout landing between 28 males and 28 females. Coordination was assessed with a modified vector coding technique and binning analysis. Total support moments (TSM), each joint's percent contribution, and timing of the TSM were compared. Females landed with less isolated knee flexion in the ankle/knee, knee/hip, and knee/trunk couplings, but more simultaneous ankle/knee flexion, less simultaneous knee flexion/hip extension, and more simultaneous trunk/knee flexion. Females landed with larger plantarflexion angles from 0-16% and smaller trunk flexion angles from 0-78%. In females, absolute TSM were larger from 0-6% and smaller from 42-100%, and normalized TSM were larger from 0-8% and 26-42%. Females had greater ankle contribution to the TSM from 14-15% and 29-35%, smaller absolute peak TSM, and the peak TSM occurred earlier. Females compensated for less isolated knee flexion with greater simultaneous ankle/knee flexion early in landing and knee/trunk flexion later in landing. Coordination and TSM differences may influence force attenuation strategies and have implications for knee injury disparity between sexes.
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Affiliation(s)
- Justin D Dennis
- Department of Exercise and Sports Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Kinesiology, California State University, Fullerton, CA, USA
| | - Kevin H Choe
- Department of Kinesiology, California State University, Fullerton, CA, USA
- Department of Kinesiology, Whittier College, Whittier, CA, USA
| | | | - Scott K Lynn
- Department of Kinesiology, California State University, Fullerton, CA, USA
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9
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Silveira AMC, Luz BC, Martinez AF, Serrão FV. Effect of augmented feedback on classical ballet jump kinematics: A single-blind randomized controlled trial. Knee 2024; 46:71-79. [PMID: 38061167 DOI: 10.1016/j.knee.2023.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 06/12/2023] [Accepted: 11/13/2023] [Indexed: 02/20/2024]
Abstract
BACKGROUND Augmented feedback strategies have been demonstrated to enhance jump-related biomechanics. Nevertheless, its effect on classical ballet is still unknown. The purpose of this study was to investigate whether a multimodal augmented feedback session is effective for improving lower limb and trunk kinematics during a classical ballet single-leg jump. METHODS In a single-blind randomized controlled trial, 36 amateur classical ballet dancers were randomly assigned to either a control group (n = 18) to receive a brief warm-up session, or an augmented feedback group (n = 18) to receive, in addition to a brief warm-up session, a combined visual feedback session associated with verbal instruction. Hip kinematics in the frontal and transversal planes and knee and trunk kinematics in the frontal plane were analysed at baseline, immediate post-intervention, and one-week post-intervention. Intervention effects were analysed using a two-way, mixed model, repeated-measures analysis of variance. RESULTS No interaction effects were observed, indicating that a single session of multimodal augmented feedback was insufficient to improve lower limb and trunk kinematics during a classical ballet single-leg jump in amateur classical ballet dancers. CONCLUSION A single session of multimodal augmented feedback should not be used as the sole component in prevention programs intended to improve jump-related kinematics in amateur classical ballet dancers.
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Affiliation(s)
- Anelise Moreti Cabral Silveira
- Graduate Program of Physical Therapy, Federal University of São Carlos, Washington Luís Highway, Km 235, SP-310, 13565-905, São Carlos, SP, Brazil. https://twitter.com/Anelise_Moreti
| | - Bruna Calazans Luz
- Graduate Program of Physical Therapy, Federal University of São Carlos, Washington Luís Highway, Km 235, SP-310, 13565-905, São Carlos, SP, Brazil
| | - Adalberto Felipe Martinez
- Graduate Program of Physical Therapy, Federal University of São Carlos, Washington Luís Highway, Km 235, SP-310, 13565-905, São Carlos, SP, Brazil
| | - Fábio Viadanna Serrão
- Graduate Program of Physical Therapy, Federal University of São Carlos, Washington Luís Highway, Km 235, SP-310, 13565-905, São Carlos, SP, Brazil.
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Phillips DA, Buckalew BR, Keough B, Alencewicz JS. Preparing to Land: Hamstring Preactivation Is Higher in Females and Is Inhibited by Fatigue. J Appl Biomech 2023; 39:370-376. [PMID: 37491013 DOI: 10.1123/jab.2022-0287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 04/27/2023] [Accepted: 06/23/2023] [Indexed: 07/27/2023]
Abstract
The hamstring plays an important role in reducing loads born by the anterior cruciate ligament. As anterior cruciate ligament injuries occur rapidly after ground contact, how the hamstring is activated prior to landing can influence injury risk. The purpose was to determine sex-related differences in hamstring activation immediately before landing and the effect of fatigue on "preactivation." Twenty-four participants (13 males and 11 females, age = 24.3 [6.5] y, mass = 72.2 [19.3] kg, height = 169 [9.7] cm) participated in this study. Participants completed a drop-vertical jump protocol before and after a lower body fatigue protocol. Hamstring electromyography (EMG) amplitude at 5 periods prior to landing, peak vertical ground reactions forces (in newtons/body weight), rate of loading (in body weight/second), and landing error scoring system were measured. Females had higher EMG amplitude before and after fatigue (P < .024), with decreased EMG amplitude for both sexes after fatigue (P = .025). There was no change on vertical ground reaction force, rate of loading, or landing error scoring system. Males and females demonstrated similar landing performance before and after fatigue but have different hamstring neuromuscular coordination strategies. The acute reduction in hamstring EMG amplitude following fatigue may increase loading on the anterior cruciate ligament.
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Affiliation(s)
- David Alan Phillips
- Program in Kinesiology, College of Public Health and Human Sciences, Oregon State University-Cascades, Bend, OR,USA
- Department of Exercise Science and Physical Education, Montclair State University, Montclair, NJ,USA
| | - Bridgette Rae Buckalew
- Department of Exercise Science and Physical Education, Montclair State University, Montclair, NJ,USA
| | - Bridget Keough
- Department of Exercise Science and Physical Education, Montclair State University, Montclair, NJ,USA
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Zamankhanpour M, Sheikhhoseini R, Letafatkar A, Piri H, Asadi Melerdi S, Abdollahi S. The effect of dual-task on jump landing kinematics and kinetics in female athletes with or without dynamic knee valgus. Sci Rep 2023; 13:14305. [PMID: 37652971 PMCID: PMC10471762 DOI: 10.1038/s41598-023-41648-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 08/29/2023] [Indexed: 09/02/2023] Open
Abstract
It has been indicated that dual tasks may multiply the possibility of injuries due to divided attention. This study aimed to investigate the effect of dual-task on kinematics and kinetics of jump landing in female athletes with and without dynamic knee valgus. In this study, 32 recreational athletes between 18 and 30 years old were recruited and divided into with (n = 17) and without (n = 15) dynamic knee valgus groups. The 3-D positions of retroreflective markers were recorded at 200 Hz using a 8-camera Kestrel system (Motion Analysis Corporation, Santa Rosa, CA), while ground reaction forces were synchronously recorded at 1000 Hz using 2 adjacent force plates (FP4060-NC; Bertec Corporation, Columbus, OH). Kinematics and kinetics of jump landing were recorded while counting backward digits as a dual task, and also without counting backward digits as a single task. One-way repeated measures of variance were used to analyse data at the significant level of 95% (α < 0.05). The study found that the dual-task affected the angles and moments of hip, knee, and ankle joints (P < 0.05) in both groups. Additionally, the effect of the dual-task differed significantly between the two groups in the angles hip flexion (P < 0.001), knee abduction (P < 0.001), and ankle internal rotation (P = 0.001), as well as the moments hip flexion (P < 0.001), hip abduction (P = 0.011), knee flexion (P = 0.017), knee internal rotation (P < 0.001), ankle dorsiflexion (P = 0.046), ankle eversion (P < 0.001), and ankle internal rotation (P = 0.046). Athletes with dynamic knee valgus may have been less able to protect themselves during the landing and are more prone to lower extremities injuries. As a result, using kinematics and kinetics in athletes with dynamic knee valgus during landing may help identify potential mechanisms associated with risk factors of lower extremity injuries and ACL injuries as well.
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Affiliation(s)
- Mina Zamankhanpour
- Department of Corrective Exercise and Sports Injury, Faculty of Sport Sciences, Allameh Tabataba'i University, Western Azadi Sport Complex Boulevard, Hakim Highway, Tehran, Iran
| | - Rahman Sheikhhoseini
- Department of Corrective Exercise and Sports Injury, Faculty of Sport Sciences, Allameh Tabataba'i University, Western Azadi Sport Complex Boulevard, Hakim Highway, Tehran, Iran.
| | - Amir Letafatkar
- Department of Biomechanics and Sports Injuries, Kharazmi University, Tehran, Iran
| | - Hashem Piri
- Department of Corrective Exercise and Sports Injury, Faculty of Sport Sciences, Allameh Tabataba'i University, Western Azadi Sport Complex Boulevard, Hakim Highway, Tehran, Iran
| | - Shakiba Asadi Melerdi
- Department of Philology, Philosophy, and Sports, Otto von Guericke University, Magdeburg, Germany
| | - Sajjad Abdollahi
- Department of Corrective Exercise and Sports Injury, Faculty of Sport Sciences, Allameh Tabataba'i University, Western Azadi Sport Complex Boulevard, Hakim Highway, Tehran, Iran
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del-Cuerpo I, Jerez-Mayorga D, Chirosa-Ríos LJ, Morenas-Aguilar MD, Mariscal-Arcas M, López-Moro A, Delgado-Floody P. Males Have a Higher Energy Expenditure than Females during Squat Training. Nutrients 2023; 15:3455. [PMID: 37571392 PMCID: PMC10421381 DOI: 10.3390/nu15153455] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/17/2023] [Accepted: 07/21/2023] [Indexed: 08/13/2023] Open
Abstract
The main objective of this study was to determine the differences in energy expenditure (EE) according to sex during and after two different squat training protocols in a group of healthy young adults. Twenty-nine Sports Sciences students volunteered to participate in this study. They attended the laboratory on four different days and completed four sessions: two sessions with 3 sets of 12 repetitions at 75% of their one-repetition maximum (RM) and two sessions with 3 sets of 30 repetitions at 50% of their 1RM. Energy expenditure was evaluated using an indirect calorimeter. Males consistently demonstrated higher EE in all sessions and intensities. The linear regression model identified a significant association between sex, BMI, and total EE across all sessions and intensities. In conclusion, males exhibited higher EE in both protocols (50% and 75% of 1RM) throughout all sessions. Furthermore, sex and BMI were found to influence EE in healthy young adults. Therefore, coaches should consider sex when assessing EE, as the metabolic response differs between males and females.
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Affiliation(s)
- Indya del-Cuerpo
- Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain; (I.d.-C.); (D.J.-M.); (L.J.C.-R.); (M.D.M.-A.)
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain
| | - Daniel Jerez-Mayorga
- Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain; (I.d.-C.); (D.J.-M.); (L.J.C.-R.); (M.D.M.-A.)
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain
- Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago 7591538, Chile
| | - Luis Javier Chirosa-Ríos
- Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain; (I.d.-C.); (D.J.-M.); (L.J.C.-R.); (M.D.M.-A.)
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain
| | - María Dolores Morenas-Aguilar
- Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain; (I.d.-C.); (D.J.-M.); (L.J.C.-R.); (M.D.M.-A.)
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain
| | - Miguel Mariscal-Arcas
- Department of Nutrition and Food Science, School of Pharmacy, University of Granada, 18071 Granada, Spain; (M.M.-A.); (A.L.-M.)
- Instituto de Investigación Biosanitaria de Granada (ibs. GRANADA), 18071 Granada, Spain
| | - Alejandro López-Moro
- Department of Nutrition and Food Science, School of Pharmacy, University of Granada, 18071 Granada, Spain; (M.M.-A.); (A.L.-M.)
| | - Pedro Delgado-Floody
- Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain; (I.d.-C.); (D.J.-M.); (L.J.C.-R.); (M.D.M.-A.)
- Department of Physical Education, Sports and Recreation, Universidad de La Frontera, Temuco 4811230, Chile
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Hu Z, Zhang Y, Dong T, Dong M, Kim S, Kim Y. Gender Differences in Neuromuscular Control during the Preparation Phase of Single-Leg Landing Task in Badminton. J Clin Med 2023; 12:jcm12093296. [PMID: 37176736 PMCID: PMC10179252 DOI: 10.3390/jcm12093296] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/01/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
BACKGROUND Studies on the biomechanical mechanisms of an anterior cruciate ligament (ACL) injury have been extensively studied, but studies on the neuromuscular control-related risk factors for an ACL injury in specific maneuvers have not been reported for badminton players. STUDY DESIGN Controlled laboratory study. METHODS Sixteen badminton players (8 male, 8 female) performed a single-leg badminton ball landing task, and lower limb muscle activity, kinematic data, and ground reaction force were measured during this procedure using marker-based movement analysis, force plates, and electromyography (EMG). Gender differences in the lower limb kinematic data, mean values of normalized lower limb muscle activation (MVC%), and co-contraction values during the landing preparation phase (100 ms before initial contact) were analyzed using MANOVA. RESULTS In the badminton landing task, the knee valgus angle was greater in females than in males (6.27 ± 2.75 vs. 1.72 ± 3.20) in the pre-landing preparation position. Compared to male badminton players, females exhibited greater gluteus maximus (44.92 ± 18.00 vs. 20.34 ± 11.64), rectus femoris (41.56 ± 9.84 vs. 26.14 ± 10.46), and medial gastrocnemius (37.39 ± 17.31 vs. 19.11 ± 11.17) lateral gastrocnemius (36.86 ± 17.82 vs. 13.59 ± 2.71) muscle activity (MVC%). CONCLUSION Female badminton players exhibit neuromuscular control strategies that may be inadequate for ACL protection and may be a potential risk factor for a high incidence of ACL injury In the future, when devising injury prevention plans for female badminton players, optimizing neuromuscular control during the pre-landing phase can be targeted.
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Affiliation(s)
- Zhe Hu
- Department of Physical Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Yanan Zhang
- Department of Physical Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Tengfei Dong
- Department of Physical Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Maolin Dong
- Department of Physical Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Sukwon Kim
- Department of Physical Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Youngsuk Kim
- Department of Physical Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
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14
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Hatamzadeh M, Sharifnezhad A, Hassannejad R, Zory R. Discriminative sEMG-based features to assess damping ability and interpret activation patterns in lower-limb muscles of ACLR athletes. Biomed Signal Process Control 2023. [DOI: 10.1016/j.bspc.2023.104665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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15
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Jonasson G, Ghasemi MH, Jonsdottir US, Briem K, Sveinsson P. Effects of gender and fatigue on strength and activity of gluteus medius muscle during a controlled cutting maneuver in preadolescent athletes. J Electromyogr Kinesiol 2023; 70:102779. [PMID: 37141731 DOI: 10.1016/j.jelekin.2023.102779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 04/17/2023] [Accepted: 04/22/2023] [Indexed: 05/06/2023] Open
Abstract
The present study aimed to investigate the effects of gender on hip muscle strength and activity during a controlled cutting maneuver in preadolescent athletes. Fifty-six football and handball preadolescent players participated (35 females and 21 males). Normalized mean activity of the gluteus medius (GM) muscle was measured using surface electromyography during cutting maneuvers in pre-activation and eccentric phases. The stance duration and the strength of hip abductors and external rotators were recorded with a force plate and a handheld dynamometer, respectively. Descriptive statistics and mixed model analysis were used to assess statistical difference (α = 0.05). The results showed that boys activate the GM muscle significantly more than girls during the pre-activation phase (P = 0.022). Boys also demonstrated greater normalized strength of hip external rotation than girls (P = 0.038), but not for hip abduction or duration of stance (P > 0.05). When adjusted for abduction strength, however, boys had significantly shorter stance duration than girls (P = 0.006). It seems that sex-dependent differences are present in preadolescent athletes as observed in the strength of hip external rotator muscles and neuromuscular activity of the GM muscle during a cutting maneuver. Future studies are needed to investigate whether these changes influence risk of lower limb/ACL injury during sport activities.
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Affiliation(s)
- G Jonasson
- Department of Physical Therapy, University of Iceland, Reykjavik, Iceland; Sjukrapjalfun Reykjavikur Physical Therapy Clinic, Reykjavik, Iceland
| | - M H Ghasemi
- Department of Physical Therapy, University of Iceland, Reykjavik, Iceland.
| | - U S Jonsdottir
- Department of Physical Therapy, University of Iceland, Reykjavik, Iceland; Gaski Physical Therapy Clinic, Reykjavik, Iceland; Department of Orthopaedics, Institute of Clinical Sciences at Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - K Briem
- Department of Physical Therapy, University of Iceland, Reykjavik, Iceland; Research Centre of Movement Science, University of Iceland, Reykjavik, Iceland
| | - P Sveinsson
- Department of Physical Therapy, University of Iceland, Reykjavik, Iceland; Research Centre of Movement Science, University of Iceland, Reykjavik, Iceland
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16
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Mulligan CM, Gibbs ER, Huang YL, Stutzenberger LR, Johnson ST, Norcross MF. Single-Legged Triple-Hop Propulsion Strategies in Females With and Those Without a History of Anterior Cruciate Ligament Reconstruction. J Athl Train 2023; 58:319-328. [PMID: 35834713 PMCID: PMC11215637 DOI: 10.4085/1062-6050-0676.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT The single-legged triple hop is a commonly used functional task after anterior cruciate ligament reconstruction (ACLR). Recently, researchers have suggested that individuals may use a compensatory propulsion strategy to mask underlying quadriceps dysfunction and achieve symmetric hop performance. OBJECTIVE To evaluate the performance and propulsion strategies used by females with and those without ACLR during a single-legged triple hop. DESIGN Cross-sectional study. SETTING Laboratory. PATIENTS OR OTHER PARTICIPANTS A total of 38 females, 19 with ACLR (age = 19.21 ± 1.81 years, height = 1.64 ± 0.70 m, mass = 63.79 ± 7.59 kg) and 19 without ACLR (control group; age = 21.11 ± 3.28 years, height = 1.67 ± 0.73 m, mass = 67.28 ± 9.25 kg). MAIN OUTCOME MEASURE(S) Hop distance and limb symmetry index (LSI) were assessed during a single-legged triple hop for distance. Propulsion strategies were evaluated during the first and second hops of the single-legged triple hop. Separate 2-way analysis-of-variance models were used to examine the influence of ACLR, joint, and their interaction on mechanical joint work, moment impulse, and the relative joint contributions to total work and moment impulse in females with and those without a history of ACLR. RESULTS Despite achieving a mean LSI of approximately 96%, the ACLR group produced less total work in the reconstructed than the uninvolved limb during single-legged triple-hop propulsion (first hop: t18 = -3.73, P = .002; second hop: t18 = -2.55, P = .02). During the first and second hops, the reconstructed knee generated 19.3% (t18 = -2.33, P = .03) and 27.3% (t18 = -4.47, P < .001) less work than the uninvolved knee. No differences were identified between the involved and uninvolved limbs of the ACLR group in moment impulse (first hop: t18 = -0.44, P = .67; second hop: t18 = -0.32; P = .76). Irrespective of limb or group, the ankle was the largest contributor to both work and moment during both the first and second hops (P < .001). CONCLUSIONS Clinicians should exercise caution when using a single-legged triple hop as a surrogate for restored lower extremity function in females post-ACLR. This recommendation is driven by the compelling findings that knee-joint deficits persisted in the reconstructed limb despite an LSI of approximately 96% and, regardless of previous injury status, single-legged triple-hop propulsion was predominantly driven by the ankle.
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Affiliation(s)
- Colin M.S. Mulligan
- School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis
| | - Emma R. Gibbs
- School of Medicine, Department of Rehabilitation Medicine, University of Washington, Seattle
| | - Yu-Lun Huang
- Department of Physical Education and Sport Sciences, National Taiwan Normal University, Taipei City
| | | | - Samuel T. Johnson
- School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis
| | - Marc F. Norcross
- School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis
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Meyer CM, Swartz EE, Register-Mihalik JK, Yeargin S, Scarneo-Miller SE. Single-Legged Triple-Hop Propulsion Strategies in Females With and Those Without a History of Anterior Cruciate Ligament Reconstruction. J Athl Train 2023; 58:319-328. [PMID: 37459390 PMCID: PMC10783470 DOI: 10.4085/1062-6050-0676.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
CONTEXT The single-legged triple hop is a commonly used functional task after anterior cruciate ligament reconstruction (ACLR). Recently, researchers have suggested that individuals may use a compensatory propulsion strategy to mask underlying quadriceps dysfunction and achieve symmetric hop performance. OBJECTIVE To evaluate the performance and propulsion strategies used by females with and those without ACLR during a single-legged triple hop. DESIGN Cross-sectional study. SETTING Laboratory. PATIENTS OR OTHER PARTICIPANTS A total of 38 females, 19 with ACLR (age = 19.21 ± 1.81 years, height = 1.64 ± 0.70 m, mass = 63.79 ± 7.59 kg) and 19 without ACLR (control group; age = 21.11 ± 3.28 years, height = 1.67 ± 0.73 m, mass = 67.28 ± 9.25 kg). MAIN OUTCOME MEASURE(S) Hop distance and limb symmetry index (LSI) were assessed during a single-legged triple hop for distance. Propulsion strategies were evaluated during the first and second hops of the single-legged triple hop. Separate 2-way analysis-of-variance models were used to examine the influence of ACLR, joint, and their interaction on mechanical joint work, moment impulse, and the relative joint contributions to total work and moment impulse in females with and those without a history of ACLR. RESULTS Despite achieving a mean LSI of approximately 96%, the ACLR group produced less total work in the reconstructed than the uninvolved limb during single-legged triple-hop propulsion (first hop: t18 = -3.73, P = .002; second hop: t18 = -2.55, P = .02). During the first and second hops, the reconstructed knee generated 19.3% (t18 = -2.33, P = .03) and 27.3% (t18 = -4.47, P < .001) less work than the uninvolved knee. No differences were identified between the involved and uninvolved limbs of the ACLR group in moment impulse (first hop: t18 = -0.44, P = .67; second hop: t18 = -0.32; P = .76). Irrespective of limb or group, the ankle was the largest contributor to both work and moment during both the first and second hops (P < .001). CONCLUSIONS Clinicians should exercise caution when using a single-legged triple hop as a surrogate for restored lower extremity function in females post-ACLR. This recommendation is driven by the compelling findings that knee-joint deficits persisted in the reconstructed limb despite an LSI of approximately 96% and, regardless of previous injury status, single-legged triple-hop propulsion was predominantly driven by the ankle.
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Affiliation(s)
| | - Erik E Swartz
- School of Health Sciences, Adelphi University, Garden City, NY
| | | | - Susan Yeargin
- Exercise Science, University of South Carolina, Columbia
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18
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Association of Proximal and Distal Factors With Lower Limb Kinematics During a Classical Ballet Jump. J Sport Rehabil 2023; 32:170-176. [PMID: 36049748 DOI: 10.1123/jsr.2021-0256] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 07/08/2022] [Accepted: 07/18/2022] [Indexed: 02/07/2023]
Abstract
CONTEXT Excessive dynamic lower limb misalignment may predispose ballet dancers to jump-related injuries. However, it is unknown whether proximal and distal factors influence this movement pattern. The aim of this study was to investigate whether hip abduction strength, foot alignment, and ankle dorsiflexion range of motion (ROM) are associated with peak angles of hip adduction and internal rotation and knee abduction during the preparation and landing phases of a classical ballet jump. DESIGN Cross-sectional study. METHODS Forty-one healthy amateur ballet dancers were included. Hip abduction strength was evaluated isometrically using a handheld dynamometer, foot alignment was determined by the shank-forefoot alignment, and weight-bearing ankle dorsiflexion ROM was measured by performing the lunge test. Peak hip and knee angles were analyzed 3-dimensionally during the preparation and landing phases of a single-leg jump. A Pearson correlation matrix was used to investigate the association of hip abduction strength, shank-forefoot alignment, and ankle dorsiflexion ROM with peak angles of hip adduction and internal rotation and knee abduction during the preparation and landing phases of the jump. RESULTS Greater hip abduction strength was associated with greater peak hip internal rotation angle (r = .43, P < .05), but not with peak hip adduction and knee abduction angles during the preparation phase of the jump. There were no associations of shank-forefoot alignment and ankle dorsiflexion ROM with peak hip and knee angles during the preparation (r = -.23 to .36, P > .05) and landing (r = -.20 to .24, P > .05) phases of the jump. There was no association of hip abduction strength with peak hip and knee angles during the landing phase of the jump (r = -.28 to .16, P > .05). CONCLUSION Hip abductors strengthening, correction of foot misalignments, and increasing ankle dorsiflexion ROM may not prevent excessive hip and knee movements during a classical ballet single-leg jump in amateur dancers.
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Foody JN, Bradley PX, Spritzer CE, Wittstein JR, DeFrate LE, Englander ZA. Elevated In Vivo ACL Strain Is Associated With a Straight Knee in Both the Sagittal and the Coronal Planes. Am J Sports Med 2023; 51:422-428. [PMID: 36625427 DOI: 10.1177/03635465221141876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Noncontact anterior cruciate ligament (ACL) injuries typically occur during deceleration movements such as landing or cutting. However, conflicting data have left the kinematic mechanisms leading to these injuries unclear. Quantifying the influence of sagittal and coronal plane knee kinematics on in vivo ACL strain may help to elucidate noncontact ACL injury mechanisms. PURPOSE/HYPOTHESIS The purpose of this study was to measure in vivo sagittal and coronal plane knee kinematics and ACL strain during a single-leg jump. We hypothesized that ACL strain would be modulated primarily by motion in the sagittal plane and that limited coronal plane motion would be measured during this activity. STUDY DESIGN Descriptive laboratory study. METHODS Seventeen healthy participants (8 male/9 female) underwent magnetic resonance imaging (MRI) followed by high-speed biplanar radiography, obtained as participants performed a single-leg jump. Three-dimensional models of the femur, tibia, and associated ACL attachment site footprints were created from the MRIs and registered to the radiographs to reproduce the position of the knee during the jump. ACL strain, knee flexion/extension angles, and varus/valgus angles were measured throughout the jump. Spearman rank correlations were used to assess relationships between mean ACL strain and kinematic variables. RESULTS Mean ACL strain increased with decreasing knee flexion angle (ρ = -0.3; P = .002), and local maxima in ACL strain occurred with the knee in a straight position in both the sagittal and the coronal planes. In addition, limited coronal plane motion (varus/valgus angle) was measured during this activity (mean ± SD, -0.5°± 0.3°). Furthermore, we did not detect a statistically significant relationship between ACL strain and varus/valgus angle (ρ = -0.01; P = .9). CONCLUSION ACL strain was maximized when the knee was in a straight position in both the sagittal and coronal planes. Participants remained in <1° of varus/valgus position on average throughout the jump. As a ligament under elevated strain is more vulnerable to injury, landing on a straight knee may be an important risk factor for ACL rupture. CLINICAL RELEVANCE These data may improve understanding of risk factors for noncontact ACL injury, which may be useful in designing ACL injury prevention programs.
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Affiliation(s)
- Jacqueline N Foody
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, USA.,Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
| | - Patrick X Bradley
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA.,Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | | | - Jocelyn R Wittstein
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
| | - Louis E DeFrate
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, USA.,Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA.,Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Zoë A Englander
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
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20
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Relationship Among 3 Different Core Stability Tests in Healthy Young Adults: Validity and Gender Differences. J Sport Rehabil 2022; 31:385-390. [PMID: 34969011 DOI: 10.1123/jsr.2021-0014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 10/23/2021] [Accepted: 10/25/2021] [Indexed: 11/18/2022]
Abstract
CONTEXT Core stability is important for preventing injury and improving performance. Although various tests for evaluating core stability have been reported to date, information on their relationship and the effect of gender differences is limited. This study aimed to (1) identify correlations among the 3 core stability tests and to examine the validity of each test and (2) identify gender differences in the test relationship and determine whether gender influenced test selection. DESIGN Cross-sectional study. METHODS Fifty-one healthy volunteers (27 men and 24 women) participated in the study. The participants underwent the following 3 tests: Sahrmann Core Stability Test (SCST), the lumbar spine motor control tests battery (MCBT), and Y Balance Test (YBT). Each parameter was analyzed according to all parameters and gender using the Spearman rank correlation coefficient. RESULTS Overall, there was a strong positive correlation between SCST and MCBT and moderate positive correlations between SCST and YBT and between MCBT and YBT. Conversely, gender-specific analyses revealed no significant correlations between YBT and SCST and between YBT and MCBT in women, although significantly strong correlations were found among all tests in men. CONCLUSION Although these 3 tests evaluated interrelated functions and may be valid as core stability tests, the results should be carefully interpreted when performing YBT in women.
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21
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Vadász K, Varga M, Sebesi B, Hortobágyi T, Murlasits Z, Atlasz T, Fésüs Á, Váczi M. Frontal Plane Neurokinematic Mechanisms Stabilizing the Knee and the Pelvis during Unilateral Countermovement Jump in Young Trained Males. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:220. [PMID: 36612542 PMCID: PMC9819922 DOI: 10.3390/ijerph20010220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/12/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
(1) The unilateral countermovement jump is commonly used to examine frontal plane kinetics during unilateral loading and to identify athletes with an increased risk of lower limb injuries. In the present study, we examined the biomechanical mechanisms of knee and pelvis stabilization during unilateral vertical jumps. (2) Healthy males performed jumps on a force plate with the dominant leg. Activity of the dominant-side gluteus medius and the contralateral-side quadratus lumborum and erector spinae muscles was recorded with surface EMG. The EMG data were normalized to the EMG activity recorded during maximal voluntary isometric hip abduction and lateral trunk flexion contractions. During jumps, the propulsive impulse was measured, and the pelvis and thigh segmental orientation angles in the frontal plane were recorded and synchronized with the EMG data. (3) The magnitude of knee valgus during the jump did not correlate with hip abduction force, but negatively correlated with gluteus medius activity. This correlation became stronger when gluteus medius activity was normalized to hip abduction force. Propulsive impulse did not correlate with any neuromechanical measurement. (4) We conclude that hip abduction force itself does not regulate the magnitude of knee valgus during unilateral jumps; rather, the gluteus medius should be highly activated to increase frontal-plane knee joint stability.
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Affiliation(s)
- Kitty Vadász
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
| | - Mátyás Varga
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
| | - Balázs Sebesi
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
| | - Tibor Hortobágyi
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
- Somogy County Kaposi Mór Teaching Hospital, 7400 Kaposvár, Hungary
- Department of Kinesiology, Hungarian University of Sports Science, 1123 Budapest, Hungary
- Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
| | - Zsolt Murlasits
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
| | - Tamás Atlasz
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
| | - Ádám Fésüs
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
| | - Márk Váczi
- Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
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Carvalho C, de Oliveira MPB, Pisani GK, Marolde IB, Serrão PRMDS. Biomechanical characteristics and muscle function in individuals with patellofemoral osteoarthritis: A systematic review of cross-sectional studies. Clin Biomech (Bristol, Avon) 2022; 98:105721. [PMID: 35868250 DOI: 10.1016/j.clinbiomech.2022.105721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 06/02/2022] [Accepted: 07/12/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND Our objective was to investigate kinematic and kinetic characteristics and changes in muscle function in individuals with patellofemoral osteoarthritis compared to healthy individuals. METHODS Searches were performed of the Medline, Embase, Web of Science, The Cochrane Library, LILACS, and SciELO databases until May of 2022 for observational studies comparing individuals with patellofemoral osteoarthritis to a control group. The PRISMA guidelines and recommendations of the Cochrane Collaboration were followed. The GRADE approach was used to analyze and synthesize the level of evidence. FINDINGS Fourteen studies were included, involving a total of 594 participants (360 with patellofemoral osteoarthritis and 234 controls). The level of evidence for pelvis, hip adduction and knee abduction angles at 45° of knee flexion during the single-leg squat, and knee flexion angle during the task of walking was very low. Regarding muscle strength, the level of evidence for isometric strength of the hip abductors, extensors and external rotators, and concentric strength of the knee extensors and flexors was very low. It was not possible to synthesize any type of evidence for kinetic, electromyography, or muscle volume variables. INTERPRETATION The level of evidence was very low for all synthesized evidence for kinematic and muscle strength variables. However, individuals with patellofemoral osteoarthritis have lower isometric strength of the hip abductor muscles. Further studies with adequate adjustment for confounding factors, such as the non-inclusion of individuals with osteoarthritis in the tibiofemoral compartment concomitant to patellofemoral osteoarthritis, are needed to gain a better understanding of the clinical characteristics of patellofemoral osteoarthritis.
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Affiliation(s)
- Cristiano Carvalho
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil; Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil.
| | - Marcos Paulo Braz de Oliveira
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil; Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Giulia Keppe Pisani
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil; Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Isabela Bianchini Marolde
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil; Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Paula Regina Mendes da Silva Serrão
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil; Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
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Jenkins AS, Pollock JR, Moore ML, Makovicka JL, Brinkman JC, Chhabra A. The 100 Most-Cited and Influential Articles in Collegiate Athletics. Orthop J Sports Med 2022; 10:23259671221108401. [PMID: 35837444 PMCID: PMC9274432 DOI: 10.1177/23259671221108401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 04/11/2022] [Indexed: 12/26/2022] Open
Abstract
Background Bibliometric citation analyses have been widely used in medicine to help researchers gain foundational knowledge about a topic and identify subtopics of popular interest for further investigations. There is a lack of similar research in collegiate athletics. Purpose To identify the 100 most-cited research publications related to collegiate athletics. Study Design Cross-sectional study. Methods The Clarivate Analytics Web of Knowledge database was used to generate a list of articles relating to collegiate athletics on January 24, 2022. Articles were filtered by the total number of citations, and the 100 most-cited articles were selected. For each article, we identified and analyzed the following: author name, publication year, country of origin, journal name, article type, main research topic area, competitive level, sex of study population, and level of evidence. Results Of the top 100 most-cited articles, 63 were related to medicine. In total, 96% of articles were published in the United States, and 80% were published in the year 2000 or later. Of the top 100 articles, 85 were observational; only 5 were experimental. The sport most represented was soccer, followed by football, baseball, and basketball. Of the top 100 articles, 21 were published in a single journal, the American Journal of Sports Medicine. Ten authors published ≥5 of the top 100 most-cited studies. Conclusion The majority of top 100 articles were published in the United States after 1999 and primarily focused on medicine-related topics. Soccer was studied by more articles than football, baseball, and basketball. An author's prestige may have influenced the likelihood of citation. The top 100 most-cited studies provide researchers, medical students, residents, and fellows with a foundational list of the most important and influential academic contributions to the literature on collegiate athletics.
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Affiliation(s)
- Anna S Jenkins
- Alix School of Medicine, Mayo Clinic, Scottsdale, Arizona, USA
| | | | - M Lane Moore
- Alix School of Medicine, Mayo Clinic, Scottsdale, Arizona, USA
| | | | - Joseph C Brinkman
- Department of Orthopedic Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | - Anikar Chhabra
- Department of Orthopedic Surgery, Mayo Clinic, Phoenix, Arizona, USA
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Carvalho C, Serrão FV, Pisani GK, Martinez AF, Serrão PRMDS. Frontal plane biomechanics during single-leg squat and hip strength in patients with isolated patellofemoral osteoarthritis compared to matched controls: A cross-sectional study. PLoS One 2022; 17:e0267446. [PMID: 35476842 PMCID: PMC9045627 DOI: 10.1371/journal.pone.0267446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 04/09/2022] [Indexed: 01/08/2023] Open
Abstract
The patellofemoral compartment of the knee is the most frequently affected by osteoarthritis. However, there is a lack of biomechanics studies on patellofemoral osteoarthritis (PFOA). This study’s purpose was to compare the frontal plane biomechanics of the trunk and lower limb during the single-leg squat and isometric hip abductor torque in individuals with isolated PFOA and controls. Frontal plane kinematics during the single-leg squat were evaluated using a three-dimensional (3-D) motion analysis system. Isometric hip abductor torque was determined using a handheld dynamometer. Twenty individuals participated in the study (10 with PFOA and 10 controls). No significant differences between groups were found regarding age (mean ± SD, PFOA group = 51.8 ± 6.9 versus control group = 47.8 ± 5.5; mean difference = 4, 95% confidence interval [CI] = -1.9 to 9.9, p = 0.20) or body mass index (PFOA group = 27.6 ± 2.2 versus control group = 25.5 ± 2.5; mean difference = 2.1, 95% confidence interval [CI] = -0.1 to 4.3, p = 0.06). Compared to control, the PFOA group presented greater hip adduction in the descending and ascending phases of the single-leg squat at 45° (mean difference [95% CI] = 6.44° [0.39–12.48°], p = 0.04; mean difference [95% CI] = 5.33° [0.24–10.42°], p = 0.045, respectively) and 60° (mean difference [95% CI] = 8.44° [2.15–14.73°], p = 0.01; mean difference [95% CI] = 7.58° [2.1–13.06°], p = 0.009, respectively) of knee flexion. No significant differences between groups were found for the frontal plane kinematics of the trunk, pelvis or knee (p > 0.05). The PFOA group exhibited lower isometric hip abductor torque (mean difference [95% CI] = -0.34 Nm/kg [-0.67 to -0.01 Nm/kg], p = 0.04). The individuals with PFOA presented greater hip adduction than the control group, which could increase lateral patellofemoral joint stress at 45° and 60° of knee flexion in the descending and ascending phases of the single-leg squat. These individuals also exhibited hip abductor weakness in comparison to healthy controls.
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Affiliation(s)
- Cristiano Carvalho
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
- Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Fábio Viadanna Serrão
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
- Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Giulia Keppe Pisani
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
- Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Adalberto Felipe Martinez
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
- Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Paula Regina Mendes da Silva Serrão
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
- Physical Therapy Post-Graduate Program, Federal University of São Carlos, São Carlos, SP, Brazil
- * E-mail:
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Seyedahmadi M, Minoonejad H, Karimizadeh Ardakani M, Heidari Z, Bayattork M, Akbari H. What are gender differences in lower limb muscle activity during jump-landing tasks? A systematic review and meta-analysis. BMC Sports Sci Med Rehabil 2022; 14:77. [PMID: 35484569 PMCID: PMC9052696 DOI: 10.1186/s13102-022-00469-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 04/19/2022] [Indexed: 11/18/2022]
Abstract
Background Gender differences in muscle activity during landing have been proposed as a possible contributing factor to the greater incidence of anterior cruciate ligament injuries in women. Conflicting results among a few studies in this regard makes it impossible to reach correct conclusions.
Objectives The aim of this study was systematic review and the meta-analysis of previous studies which have compared the electromyographic activity of lower limb muscles in gluteus muscles (maximus and medius), quadriceps (rectus femoris, vastus medialis and lateralis), hamstrings (biceps femoris and semimembranosus), and gastrocnemius in men and women in jump–landing task. Methods A systematic search of the PubMed, SCOPUS, Science Direct databases was performed for eligible articles in October 2020. Cross-sectional studies that compared the muscle activity of male and female athletes without a history of previous injury in the jump–landing task were included. Unisex and non-athlete's studies were extracted from the included studies. The data were synthesized using a fixed and random effects model. Results Eight studies involving 145 participants were included. All participants were people who participated in regular exercises. The meta-analysis of timing and muscle activity was performed in the feedforward (pre contact) and feedback (post contact) stages. There were no significant differences in the muscle activity of biceps femoris (MD = −12.01; 95% CI − 51.49 to 27.47; p = 0.55; I2 = 87%), vastus medialis (MD = −53.46; 95% CI − 129.73 to 22.81; p = 0.17; I2 = 91%), semimembranosus (MD = 1.81; 95% CI − 6.44 to 10.07; p = 0.67; I2 = 0%), gluteus medius (MD = −3.14; 95% CI − 14.24 to 7.96; p = 0.58; I2 = 48%), and rectus femoris (MD = −5.83; 95% CI − 14.57 to 2.92; p = 0.19; I2 = 87%) in the pre contact phase between two sexes. There was a significant difference between men and women in the activity of vastus lateralis muscle in the post contact phase (MD = −34.90; 95% CI − 48.23 to − 21.57). No significant difference was observed between the men and women in the timing of semimembranosus (MD = 23.53; 95% CI − 14.49 to 61.54; p = 0.23; I2 = 56%) and biceps femoris muscle activity (MD = −46.84; 95% CI − 97.50 to 3.83; p = 0.07; I2 = 82%). Conclusion The results showed that in all lower limb muscles except vastus lateralis there were no significant differences between muscle activity and muscle contraction timing in both sexes before and after foot contact. Therefore, it can be concluded that the reason for the greater susceptibility of ACL injuries in women than men is maybe related to other factors such as biomechanical and hormonal. Additional good quality research in this regard is required to strengthen these conclusions.
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Affiliation(s)
| | - Hooman Minoonejad
- Department of Health and Sport Medicine, University of Tehran, Tehran, Iran.
| | | | - Zahra Heidari
- Department of Epidemiology and Biostatistics, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Bayattork
- Department of Sport Sciences, University of Hormozgan, Bandar Abbas, Iran
| | - Hadi Akbari
- Department of Sport Sciences, University of Zabol, Zabol, Iran
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Butler LS, Martinez AR, Sugimoto D, Wyatt CW, Milian EK, Ulman S, Erdman A, Loewen A, Hayden K, DeVerna A, Tulchin-Francis K, Research Interest Group PRIP. Reliability of the Expanded Cutting Alignment Scoring Tool (E-CAST) to Assess Trunk and Limb Alignment During a 45-Degree Side-Step Cut. Int J Sports Phys Ther 2022; 17:456-465. [PMID: 35391867 PMCID: PMC8975584 DOI: 10.26603/001c.33045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 01/23/2022] [Indexed: 12/05/2022] Open
Abstract
Background Current clinical screening tools assessing risky movements during cutting maneuvers do not adequately address sagittal plane foot and ankle evaluations. The Cutting Alignment Scoring Tool (CAST) is reliable in evaluating frontal plane trunk and lower extremity alignment during a 45-degree side-step cut. The Expanded Cutting Alignment Scoring Tool (E-CAST) includes two new sagittal plane variables, knee flexion and ankle plantarflexion angle. Hypothesis/Purpose To assess the inter-and intra-rater reliability of the E-CAST to evaluate trunk and lower extremity alignment during a 45-degree side-step cut. Study Design Repeated Measures. Methods Participants included 25 healthy females (13.8 ± 1.4 years) regularly participating in cutting or pivoting sports. Participants were recorded performing a side-step cut in frontal and sagittal planes. One trial was randomly selected for analysis. Two physical therapists independently scored each video using the E-CAST on two separate occasions, with randomization and a two-week wash-out between rounds. Observed movement variables were awarded a score of "1", with higher scores representing poorer technique. Intraclass correlation coefficients (ICC) and 95% confident intervals (95% CI) were calculated for the total score, and a kappa coefficient (k) was calculated for each variable. Results The cumulative intra-rater reliability was good (ICC=0.78, 95% CI 0.59-0.96) and the cumulative inter-rater reliability was moderate (ICC=0.71, 95% CI 0.50-0.91). Intra-rater kappa coefficients ranged from moderate to excellent for all variables (k= 0.50-0.84) and inter-rater kappa coefficients ranged from slight to excellent for all variables (k=0.20-0.90). Conclusion The addition of two sagittal plane variables resulted in lower inter-rater ICC compared to the CAST (ICC= 0.81, 95% CI 0.64-0.91). The E-CAST is a reliable tool to evaluate trunk and LE alignment during a 45-degree side-step cut, with good intra-rater and moderate inter-rater reliability. Level of Evidence Level 2, Diagnosis.
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Affiliation(s)
| | | | - Dai Sugimoto
- The Micheli Center for Sports Injury Prevention, Waltham, MA, USA; Faculty of Sport Sciences, Waseda University, Tokyo, Japan
| | - Charles W Wyatt
- Scottish Rite for Children, Dallas, TX, USA; University of Texas Southwestern Medical Center, Dallas, TX, USA
| | | | | | | | | | | | | | | | - PRiSM Injury Prevention Research Interest Group
- Nicklaus Children's Hospital, Miami, FL, USA
- The Micheli Center for Sports Injury Prevention, Waltham, MA, USA; Faculty of Sport Sciences, Waseda University, Tokyo, Japan
- Scottish Rite for Children, Dallas, TX, USA; University of Texas Southwestern Medical Center, Dallas, TX, USA
- University of Miami, Miami, FL, USA
- Scottish Rite for Children, Dallas, TX, USA
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Cannon J, Weithman BA, Powers CM. Activation training facilitates gluteus maximus recruitment during weight-bearing strengthening exercises. J Electromyogr Kinesiol 2022; 63:102643. [DOI: 10.1016/j.jelekin.2022.102643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 11/02/2021] [Accepted: 11/30/2021] [Indexed: 11/26/2022] Open
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Mehls K, Grubbs B, Jin Y, Coons J. Electromyography Comparison of Sex Differences During the Back Squat. J Strength Cond Res 2022; 36:310-313. [PMID: 32032232 DOI: 10.1519/jsc.0000000000003469] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Mehls, K, Grubbs, B, Jin, Y, and Coons, J. Electromyography comparison of sex differences during the back squat. J Strength Cond Res 36(2): 310-313, 2022-Currently, there is limited information regarding the muscle activity differences between men and women during the traditional back squat. The back squat is a widely used exercise which stimulates lower-body musculature; thus, information regarding the muscle activity patterns during this exercise is pertinent when prescribing resistance training. This study evaluated muscle activity differences (using surface electromyography) in men and women during the traditional back squat with a load prescribed to elicit strength gains. Resistance-trained men (n = 14) and women (n = 14) performed 3 sets of 4 repetitions in the traditional back squat using 85% of their pretest 1 repetition maximum. Muscle activity data were collected for 6 muscles including the vastus lateralis, vastus medialis, rectus femoris, gluteus maximus, semitendinosus, and biceps femoris (BF). Independent sample t tests revealed a significantly higher normalized muscle activity in men in the BF muscle during the descending phase of the back squat. No other muscle activity differences were present between men and women. These results indicate that men activate the BF muscle during the traditional back squat to a greater extent than women. For women, it may be necessary to consider other exercises to optimally stimulate and strengthen the BF muscle during resistance training.
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Affiliation(s)
- Kelton Mehls
- Department of Exercise Science, Walsh University, North Canton, Ohio; and
| | | | - Ying Jin
- Psychology, Middle Tennessee State University, Murfreesboro, Tennessee
| | - John Coons
- Departments of Health and Human Performance; and
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Dadfar M, Sheikhhoseini R, Jafarian M, Esmaeili A. Lower extremity kinematic coupling during single and double leg landing and gait in female junior athletes with dynamic knee valgus. BMC Sports Sci Med Rehabil 2021; 13:152. [PMID: 34886878 PMCID: PMC8662875 DOI: 10.1186/s13102-021-00385-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/07/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Dynamic knee valgus (DKV) is a common lower extremity movement disorder among females. This study aimed to investigate kinematic couplings between lower extremity joints in female junior athletes with DKV during single and double-leg landing and gait. METHODS Twenty-six physically active female junior athletes (10-14 years old) with DKV were recruited. Kinematic couplings between rearfoot, tibia, knee, and hip were extracted using eight Vicon motion capture cameras and two force plates. Zero-lag cross-correlation coefficient and vector coding were used to calculate kinematic couplings between joints during physical tasks. Paired t-test and Wilcoxon tests were run to find significant couplings between joint motions and coupling strengths. Bonferroni posthoc was used to determine significance with α ≤ 0.05. RESULTS The results showed that the strongest kinematic relationship existed between rearfoot eversion/inversion and tibial internal/external rotation during all three tasks. Correlations of the rearfoot supination/pronation with tibial rotations, knee, and hip motions in sagittal, frontal, and transverse planes were very strong to strong during double-leg landing and moderate to weak during gait. A weak correlation was observed between rearfoot supination/pronation and hip adduction/abduction during single-leg landing. CONCLUSIONS Coupling relationships between rearfoot, knee, and hip vary by the task intensity and alignment profiles in female juniors with DKV.
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Affiliation(s)
- Mahdis Dadfar
- Department of Corrective Exercise and Sport Injury, Faculty of Physical Education and Sport Sciences, Allameh Tabataba’i University, Western Azadi Sport Complex Boulevard, Hakim Highway, Tehran, Iran
| | - Rahman Sheikhhoseini
- Department of Corrective Exercise and Sport Injury, Faculty of Physical Education and Sport Sciences, Allameh Tabataba’i University, Western Azadi Sport Complex Boulevard, Hakim Highway, Tehran, Iran
| | - Mohadeseh Jafarian
- Department of Electrical Engineering, Faculty of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Alireza Esmaeili
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia
- Australian Football League (AFL), Melbourne, Australia
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Acute Effects of Static Self-Stretching Exercises and Foam Roller Self-Massaging on the Trunk Range of Motions and Strength of the Trunk Extensors. Sports (Basel) 2021; 9:sports9120159. [PMID: 34941797 PMCID: PMC8708179 DOI: 10.3390/sports9120159] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/21/2021] [Accepted: 11/23/2021] [Indexed: 12/04/2022] Open
Abstract
Although the effectiveness of static self-stretching exercises (SSSEs) and foam roller self-massaging (FRSM) in joint range of motion and muscle strength of the lower limbs has been extensively investigated, little is known about their effectiveness on the posterior trunk muscles. The present study aimed to investigate the acute effects of two 7-min SSSEs and FRSM intervention protocols on the range of trunk movements and the strength of the trunk extensors. Twenty-five healthy active males (n = 14) and females (n = 11) performed each intervention separately, one week apart. The range of motion (ROM) of the trunk-hip flexion (T-HF), the ROM of the trunk side-flexion (TSF) and rotation (TR) bilaterally, as well as the isometric maximum strength (TESmax) and endurance (TESend) of the trunk extensors were measured before and after each intervention. The ROMs of T-HF, TSF, and TR were significantly increased following both SSSEs and FRSM. The TESmax and TESend were also significantly increased after FRSM, but decreased following SSSEs. While both interventions were effective in increasing the range of motion of the trunk, a single 7-min session of FRSM presented more advantages over a similar duration SSSEs protocol due to the increase in the strength of the trunk extensors it induced.
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Effects of Limb Dominance on Postural Balance in Sportsmen Practicing Symmetric and Asymmetric Sports: A Pilot Study. Symmetry (Basel) 2021. [DOI: 10.3390/sym13112199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The current literature shows no consensus regarding the difference between the dominant leg (D-Leg) and the non-dominant leg (ND-Leg) in terms of postural control. This lack of consensus could stem from motor experience (i.e., symmetric or asymmetric motricity) and/or the physiological state induced by physical exercise. This study aimed to investigate the acute effects of fatiguing exercise on postural control when standing on the D-Leg and the ND-Leg, in athletes practicing symmetric (SYM) and asymmetric (ASYM) sports. Thirty healthy male participants were recruited and divided into two groups, (SYM n = 15) and (ASYM n = 15, on the basis of the motricity induced by the sport they practice. Monopedal postural control was assessed for the D-Leg and the ND-Leg before and after the fatigue period (which consisted of repeating squats until exhaustion). A force platform was used to calculate the spatio-temporal characteristics of the displacements of the center of foot pressure (COP). A significant fatigue effect was observed in both groups on the D-Leg and the ND-Leg for all the COP parameters. There was a tendency (p = 0.06) between the ASYM and SYM groups on the D-Leg, concerning the relative increase in the COP velocity in the frontal plane after the fatigue period. The fatigue condition disturbed postural control in both the SYM and ASYM groups on the D-Leg and ND-Leg. This disturbing effect related to fatigue tends to be more marked in athletes practicing asymmetric sports than in athletes practicing symmetric sports on the D-Leg.
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Mercader-Vila E. Prevention of non-contact anterior cruciate ligament injuries in female athletes. Let us make it easy. APUNTS SPORTS MEDICINE 2021. [DOI: 10.1016/j.apunsm.2021.100371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Oshikawa T, Adachi G, Akuzawa H, Okubo Y, Kaneoka K. Coordinate activity of the quadratus lumborum posterior layer, lumbar multifidus, erector spinae, and gluteus medius during single-leg forward landing. J Electromyogr Kinesiol 2021; 61:102605. [PMID: 34563761 DOI: 10.1016/j.jelekin.2021.102605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 08/20/2021] [Accepted: 09/17/2021] [Indexed: 10/20/2022] Open
Abstract
This study aimed to clarify the differences in electromyographic activity between the quadratus lumborum anterior (QL-a) and posterior layers (QL-p), and the relationship among trunk muscles and gluteus medius (GMed) activities during forward landing. Thirteen healthy men performed double-leg and single-leg (ipsilateral or contralateral sides as the electromyography measurement of trunk muscles) forward landings from a 30 cm-height-box. The onset of electromyographic activity in pre-landing and the electromyographic amplitude of the unilateral QL-a, QL-p, abdominal muscles, lumbar multifidus (LMF), erector spinae (LES), and bilateral GMed were recorded. Two-way ANOVA was used to compare the onset of electromyographic activity (3 landing leg conditions × 10 muscles) and electromyographic amplitude among (3 landing leg conditions × 2 phases). The onset of QL-p was significantly earlier in contralateral-leg landing than in the double-leg and ipsilateral-leg landings. The onset of LMF and LES was significantly earlier than that of the abdominal muscles in contralateral-leg landing. QL-p activity and GMed activity on the contralateral leg side in the pre-landing were significantly higher in contralateral-leg landing than in the other leg landings. To prepare for pelvic and trunk movements after ground contact, LMF, LES, QL-p on non-support leg side, and GMed on support leg side showed early or high feedforward activation before ground contact during single-leg forward landing.
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Affiliation(s)
| | - Gen Adachi
- Faculty of Sport Sciences, Waseda University, Tokyo, Japan
| | - Hiroshi Akuzawa
- Waseda Institute for Sport Sciences, Waseda University, Tokyo, Japan
| | - Yu Okubo
- Faculty of Health & Medical Care, Saitama Medical University, Saitama, Japan
| | - Koji Kaneoka
- Waseda Institute for Sport Sciences, Waseda University, Tokyo, Japan
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Immediate Effect of Anterior Cruciate Ligament Protective Knee Taping on Knee Landing Mechanics and Muscle Activations during Side Hops. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph181910110. [PMID: 34639413 PMCID: PMC8508252 DOI: 10.3390/ijerph181910110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 12/02/2022]
Abstract
Athletic taping is widely used in sports to prevent injury. However, the effect of anterior cruciate ligament (ACL) protective taping on neuromuscular control during dynamic tasks remains unclear. Therefore, this study aimed to investigate the immediate effect of ACL protective taping on landing mechanics and muscle activations during side hops in healthy individuals. Fifteen healthy individuals (11 males and 4 females; age, 23.1 ± 1.4 years; height, 175.1 ± 10.4 cm; weight, 66.3 ± 11.2 kg) volunteered to participate in this study. Landing mechanics and muscle activations were measured while each participant performed single-leg hops side-to-side for ten repetitions with and without taping. An optical motion capture system and two force plates were used to collect the kinematic and kinetic data during the side hops. Surface electromyogram recordings were performed using a wireless electromyography system. Paired t-tests were performed to determine the differences in landing mechanics and muscle activations between the two conditions (taping and non-taping). The level of significance was set at p < 0.05. Compared with the non-taping condition, participants landed with a smaller knee abduction angle, greater knee external rotation angle, and smaller knee extensor moment in the taping condition. Given that greater knee abduction, internal rotation, and knee extension moment are associated with a greater risk of ACL injury, our findings suggest that ACL protective taping can have an immediate effect on dynamic knee stability. Clinicians should consider using ACL protective taping to facilitate the use of favorable landing mechanics for ACL injuries.
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Lower extremity energy absorption strategies at different phases during single and double-leg landings with knee valgus in pubertal female athletes. Sci Rep 2021; 11:17516. [PMID: 34471189 PMCID: PMC8410826 DOI: 10.1038/s41598-021-96919-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 07/19/2021] [Indexed: 02/07/2023] Open
Abstract
Dynamic knee valgus (DKV) malalignment affects the biomechanical characteristic during sports activities. This cross-sectional study was conducted to evaluate mechanical energy absorption (MEA) strategies at initial contact (IC) and total landing (TL) phases during single-leg landing (SLL), and double-leg landing (DLL). Twenty-eight female athletes with DKV (age 10-14) were invited. MEA analysis of lower extremity joints was done in sagittal and frontal motion planes employing 8 Vicon motion capture cameras and 2 Kistler force plates. Statistical analysis was done using IBM Statistics (version24) by Bivariate Pearson Correlation Coefficient test. Knee extensors MEA during SLL (IC: P = 0.008, R = 0.522/TL: P < 0.001, R = 0.642) and DLL (IC: P < 0.001, R = 0.611/TL: P = 0.011, R = 0.525), and knee abductors during SLL (IC: P = 0.021, R = 0.474) were positively correlated with increased DKV angle. Ankle plantar flexors during SLL (TL: P = 0.017, R = - 0.477) and DLL (TL: P = 0.028, R = - 0.404), and hip extensors during SLL (TL: P = 0.006, R = - 0.5120) were negatively correlated with increased DKV angle. Compensated MEA in knee extensors was correlated with less ankle plantar flexion MEA during SLL (IC: P = 0.027, R = - 0.514/TL: P = 0.007, R = - 0.637) and DLL (IC: P = 0.033, R = - 00.412/TL: P = 0.025, R = - 0.485). These outcomes indicated a knee-reliant MEA strategy in female athletes with DKV during puberty, putting them at higher risks of ACL injuries during landing.
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Sex differences in muscle activation patterns associated with anterior cruciate ligament injury during landing and cutting tasks: A systematic review. J Electromyogr Kinesiol 2021; 60:102583. [PMID: 34392010 DOI: 10.1016/j.jelekin.2021.102583] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 06/22/2021] [Accepted: 07/24/2021] [Indexed: 01/13/2023] Open
Abstract
Neuromuscular control is critical for maintaining dynamic joint stability and mitigating the risk of anterior cruciate ligament (ACL) injury. Given the increased risk of ACL injury in females, sex-based differential muscle activation strategies are often associated with this risk. For example, the quadriceps-dominant muscle activation strategy sometimes observed in females has been discussed as a cause of their increased risk of ACL injury. However, there has been no synthesised knowledge on sex differences in muscle activation patterns associated with ACL injuries. Therefore, the purpose of this review was to synthesise sex differences in muscle activation patterns in movements associated with ACL injuries in both adult and adolescent populations. A systematic electronic database search was conducted. Thirty studies were included in the review. Females demonstrated higher pre- and post-landing activation of the quadriceps and lower activation of the hamstrings in 15 studies. Females also had higher quadriceps-to-hamstring co-contraction ratios during pre- and post-landing phases compared to their male counterparts in 4 of 9 studies that considered co-contraction. While some studies supported the quadriceps-dominant activation strategies in females, no consensus can be drawn due to methodological inconsistencies and limitations. Also, despite the importance of ACL injury prevention in children and adolescents, the evidence on sex difference in muscle activation patterns in this population is insufficient to draw meaningful conclusions.
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Colyer S, Miles JJ, Crump FJ, Hall-Martinez JP, Little GS, Mallabone J, Chapman AJ, Cumming SP. Association between biological maturation and anterior cruciate ligament injury risk factors during cutting. J Sports Med Phys Fitness 2021; 62:1078-1087. [PMID: 34275261 DOI: 10.23736/s0022-4707.21.12590-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Adolescent females are particularly susceptible to suffering anterior cruciate ligament (ACL) injuries, likely influenced by well-established maturational changes. This study investigated ACL biomechanical injury risk factors and their association with biological maturation in females. METHODS Thirty-five adolescent females (15 ± 1 yr) completed a series of maximum-effort 90° unanticipated cutting manoeuvres. Established biomechanical ACL injury risk factors (including external knee abduction moments, knee abduction, hip abduction, knee flexion, ground reaction force) were derived from an optoelectronic motion analysis system and force platforms, with inter-limb asymmetries in these risk factors also computed. Biological maturation (percentage of predicted adult stature) was assessed using validated regression equations, incorporating anthropometric measures of participants and their biological parents. RESULTS Significant bilateral asymmetries were observed with higher peak external knee abduction moments, higher ground reaction forces and less knee flexion (from 0-18% and 30-39% of contact) during the non-dominant vs. dominant cuts (effect sizes = 0.36, 0.63 and 0.50, respectively). Maturation did not appear to influence these asymmetries; however, less hip abduction was observed (e.g. 21-51% of contact for dominant cuts) in more biologically-mature females. CONCLUSIONS These results highlight a potential maturationrelated change in cutting technique that may explain the apparent heightened ACL injury risk in this population. As females mature, training targeted at neuromuscular control of hip abductor (e.g. gluteal) muscle groups could potentially mitigate ACL injury risk.
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Affiliation(s)
- Steffi Colyer
- Department for Health, University of Bath, Bath, UK -
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Sheikhi B, Letafatkar A, Thomas AC. Comparing myofascial meridian activation during single leg vertical drop jump in patients with anterior cruciate ligament reconstruction and healthy participants. Gait Posture 2021; 88:66-71. [PMID: 34004589 DOI: 10.1016/j.gaitpost.2021.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 04/23/2021] [Accepted: 05/05/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Muscles work synergistically to support the body during landing. Myofascial meridians have been described to classify muscles into functional synergies. The role that these functional lines plays in positioning the trunk and lower extremity of patients with anterior cruciate ligament reconstruction (ACLR) and healthy athletes during drop landing tasks remains unclear. RESEARCH QUESTION The purpose of this study was to compare the front and back functional lines (FFL and BFL) muscle activation in patients with ACLR and healthy participants during single leg vertical drop jump (SLVDJ). METHODS Thirty-two male athletes (post-ACLR = 16, healthy = 16) participated (age = 23.3 ± 2.3 years). Superficial electromyography of FFL (adductor longus [AL], rectus abdominis [RA], pectoralis major) and BFL (vastus lateralis [VL], gluteus maximus [GMax], latissimus dorsi [LD]) was collected during the SLVDJ and compared at initial contact and maximum knee flexion between groups using t-tests and limbs using paired-samples t-tests. RESULTS In the FFL, the AL (p < 0.05) and RA (p < 0.05) muscles were more active in the healthy group compared to the ACLR group at initial contact and maximum knee flexion. PM demonstrated greater activation in the healthy group only at maximum knee flexion (p < 0.05). In the BFL, the VL (p < 0.05) and GMax (p < 0.05) muscles were more active in the ACLR group, whereas the LD (p < 0.05) muscles demonstrated greater activation in the healthy group at initial contact and maximum knee flexion. There were no healthy group inter-limb differences in FFL and BFL activation. ACLR participants demonstrated greater non-injured limb VL, AL, GMax and LD activation (p < 0.05) and greater injured limb PM and RA activation (p < 0.05). SIGNIFICANCE Based on the present data, patients after ACLR may present with an alteration in BFL and FFL muscles activation during a drop jump task. Functional line muscles during dynamic activities may change lower extremity positioning and lead to increase ACL injury risk.
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Affiliation(s)
- Bahram Sheikhi
- Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran, Iran.
| | - Amir Letafatkar
- Sport Injury and Corrective Exercises, Kharazmi University, Tehran, Iran.
| | - Abbey C Thomas
- Department of Kinesiology, University of North Carolina at Charlotte Charlotte, NC, United States.
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Simionescu AA, Cirstoiu MM, Cirstoiu C, Stanescu AMA, Crețu B. Current Evidence about Developmental Dysplasia of the Hip in Pregnancy. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:655. [PMID: 34206824 PMCID: PMC8305660 DOI: 10.3390/medicina57070655] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/18/2021] [Accepted: 06/22/2021] [Indexed: 11/16/2022]
Abstract
In adults, developmental dysplasia of the hip (DDH) represents a spectrum of disorders. It is commonly found in women in routine orthopedic practice. Hip dysplasia is a leading precursor of joint laxity; when untreated, it can contribute to chronic modifications, such as thickening of the pulvinar and ligamentum teres (which can also elongate), hypertrophy of the transverse acetabular ligament, and osteoarthritis. DDH is presumed to be associated with alterations in pelvic morphology that may affect vaginal birth by the reduction in the transverse diameter of the pelvic inlet or outlet. Here, we provide an overview of the current knowledge of pregnancy-associated DDH. We primarily focused on how a surgical DDH treatment might influence the pelvic shape and size and the effects on the mechanism of birth. We presented the female pelvis from the standpoint of bone and ligament morphology relative to a pelvic osteotomy. Then, we described whether the pregnancy was impacted by previous surgical DDH treatments, performed from infancy to adulthood. In conclusion, hip dysplasia is not associated with high-risk complications during pregnancy or with increased difficulty in vaginal delivery.
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Affiliation(s)
- Anca Angela Simionescu
- Department of Obstetrics and Gynecology, “Carol Davila” University of Medicine and Pharmacy, Filantropia Clinical Hospital, 011171 Bucharest, Romania;
| | - Monica Mihaela Cirstoiu
- Department of Obstetrics and Gynecology, “Carol Davila” University of Medicine and Pharmacy, University Emergency Hospital, 050098 Bucharest, Romania;
| | - Catalin Cirstoiu
- Department of Orthopedics and Traumatology, “Carol Davila” University of Medicine and Pharmacy, University Emergency Hospital, 050098 Bucharest, Romania; (C.C.); (B.C.)
| | | | - Bogdan Crețu
- Department of Orthopedics and Traumatology, “Carol Davila” University of Medicine and Pharmacy, University Emergency Hospital, 050098 Bucharest, Romania; (C.C.); (B.C.)
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Shih Y, Fisher BE, Kutch JJ, Powers CM. Corticomotor excitability of gluteus maximus and hip extensor strength: The influence of sex. Hum Mov Sci 2021; 78:102830. [PMID: 34130254 DOI: 10.1016/j.humov.2021.102830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 06/03/2021] [Accepted: 06/06/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE To compare hip extensor strength and corticomotor excitability (CME) of gluteus maximus (GM) between males and females. A secondary purpose was to determine if CME of GM is predictive of hip extensor strength. METHOD Thirty-two healthy individuals participated (15 males and 17 females). CME of GM was assessed using the input-output curve (IOC) procedure acquired from transcranial magnetic stimulation (average slope). Hip extensor strength was measured by a dynamometer during a maximal voluntary isometric contraction. Independent t-tests were used to compare CME of GM and peak hip extensor torque between males and females. Linear regression analysis was used to determine whether peak hip extensor torque was predicted by CME of GM. RESULT Compared to males, females demonstrate lower peak hip extensor torque (4.42 ± 1.11 vs. 6.15 ± 1.72 Nm/kg/m2, p < 0.01) and lower CME of GM (1.36 ± 1.07 vs. 2.67 ± 1.30, p < 0.01). CME of GM was a significant predictor of peak hip extensor torque for males and females combined (r2 = 0.36, p < 0.001). CONCLUSION Our findings support the premise that corticomotor excitability plays a role in the ability of a muscle to generate torque.
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Affiliation(s)
- Yo Shih
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, United States of America; Department of Physical Therapy, University of Nevada, Las Vegas, NV, United States of America
| | - Beth E Fisher
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, United States of America
| | - Jason J Kutch
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, United States of America
| | - Christopher M Powers
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, United States of America.
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Mojaddarasil M, Sadigh MJ. On the impact force analysis of two-leg landing with a flexed knee. Comput Methods Biomech Biomed Engin 2021; 24:1862-1875. [PMID: 34027762 DOI: 10.1080/10255842.2021.1925257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This article looks into the effects of the initial knee flexion angle at the contact time on the peak of the impulsive lower limb forces during landing, and how these effects are related to muscular activities. The impact dynamics of drop landing is studied via a musculoskeletal model with eight Hill-type lower-limb muscles. A method is proposed for the representation of two landing strategies: landing with high and low joint stiffness. Then, in each landing strategy, the effect of the initial knee flexion angle on the peak ground reaction force (GRF), the peak knee ligaments force and the peak tibiofemoral contact force is investigated by considering different initial contact postures. It is observed that while landing with a flexed knee decreases the peak GRF in both landing strategies, it decreases the peak tibiofemoral and knee ligaments forces only in landing with low joint stiffness. Specifically, by increasing the initial knee flexion from 0° to 70°, the peak tibiofemoral and knee ligaments forces decrease monotonically by 54% and 82%, in landing with low joint stiffness. For high joint stiffness, however, as the initial knee flexion increases from 10° to 70°, the peak tibiofemoral force is seen to increase monotonically by 42% and the peak knee ligaments force is seen to have a non-monotonic behavior, first decreasing by 42%, and then, increasing by 250%. These results can be considered in training landing strategies to reduce the risk of knee injury.
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Affiliation(s)
- Marzieh Mojaddarasil
- Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Contribution of Lower Extremity Joints on Energy Absorption during Soft Landing. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18105130. [PMID: 34066090 PMCID: PMC8151821 DOI: 10.3390/ijerph18105130] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 05/07/2021] [Accepted: 05/07/2021] [Indexed: 11/21/2022]
Abstract
Soft landing after jumping is associated with the prevention of lower extremity injuries during sports activities in terms of the energy absorption mechanisms. In this study, the contribution of lower extremity joints during soft landing was investigated. Subjects comprised 20 healthy females. Kinetics and kinematics data were obtained during drop vertical jumps using a three-dimensional motion analysis system. Negative mechanical work values in the lower extremity joints were calculated during landing. A multiple regression analysis was performed to determine which lower extremity joints contributed more in achieving soft landing. The means of mechanical work of the hip, knee, and ankle in the sagittal plane were −0.30 ± 0.17, −0.62 ± 0.31, and −1.03 ± 0.22 J/kg, respectively. Results showed that negative mechanical work in the hip and knee is effective in achieving soft landing. These findings indicate that energy absorption in the hip and knee joints might be an important factor in achieving soft landing, whereas that in the ankle has a negative effect. Therefore, when improving soft landing techniques, we should consider energy absorption in the hip and knee via eccentric activation of the hip and knee extensors during landing.
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Silva FMD, Canêz DB, Madeira AR, Ferreira GD. Dynamic Knee Alignment and Pelvic Balance: Comparison Regarding Gender in Young Soccer Athletes. Rev Bras Ortop 2021; 56:175-180. [PMID: 33935313 PMCID: PMC8075638 DOI: 10.1055/s-0040-1721361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 09/16/2020] [Indexed: 11/30/2022] Open
Abstract
Objective
To evaluate knee alignment in the frontal plane and pelvic balance during the step-down test in female and male soccer players.
Methods
Cross-sectional study carried out with male and female soccer players from under-15 and under-17 teams of a professional club in Southern Brazil. The step-down test was performed, filmed with a video camera, and evaluated according to the angular measurements obtained during movement using the Kinovea software (open source), version 0.8.24.
Results
The sample consisted of 38 individuals, 19 males and 19 females. Female athletes had a greater varus angle (9.42° ± 1.65°) compared to male athletes (3.91° ± 2.0°;
p
= 0.04). There was no difference regarding the unilateral pelvic drop between the groups. In addition, the association between the hip-related pelvic drop and the projection angle on the frontal plane of the knee was weak in both genders.
Conclusion
Even though the pelvic drop was observed in both genders, young female athletes had greater varus knee angles on the step-down test, which require greater attention to minimize the risk of injury.
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Affiliation(s)
| | - Denis Bordoni Canêz
- Curso de Fisioterapia, Universidade Católica de Pelotas, Pelotas, Rio Grande do Sul, Brasil
| | | | - Gustavo Dias Ferreira
- Departamento de Fisiologia e Farmacologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brasil
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Hedayatpour N, Mohammed Sediq Rashid D, Izanloo Z, Seylaneh H, Falla D. Men and women show different adaptations of quadriceps activity following fatiguing contractions: An explanation for the increased incidence of sports-related knee injuries in women? J Electromyogr Kinesiol 2021; 58:102552. [PMID: 33930804 DOI: 10.1016/j.jelekin.2021.102552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 11/19/2022] Open
Abstract
We investigated whether adaptations of quadriceps muscle activity to fatiguing exercise differs between sexes. Fifteen healthy men (age, mean ± SD; 22. ± 2.4 yr, body mass 70.5 ± 11.4 kg, height 1.72 ± 0.06 m) and 15 healthy women (age, mean ± SD; 21 ± 1.8 yr, body mass 60 ± 7.5 kg, height 1.62 ± 0.07 m), all right leg dominant, participated in the study. Participants performed a submaximal isometric knee extension contraction at 50% of the maximum voluntary contraction (MVC) sustained until task failure before and after a fatiguing exercise. Surface electromyography (EMG) was simultaneously recorded from nine regions distributed over the medial, middle and lateral locations of the quadriceps muscles in a longitudinal direction corresponding to the vastus medialis, rectus femoris (RF) and vastus lateralis muscle, respectively. A significant reduction in maximal force and time to task failure were observed after fatiguing exercise for both sexes (P < 0.001). However, women displayed greater myoelectric manifestations of fatigue specifically for the RF during the post-fatigue sustained contraction (P < 0.05). The RF is more susceptible to fatiguing exercise in women compared to men which may partly explain the higher risk of knee injuries among female athletes during competitive sports.
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Affiliation(s)
- Nosratollah Hedayatpour
- Center for Biomechanics and Motor Control (BMC), Department of Physical Education and Sport Science, University of Bojnord, Bojnord, Iran
| | | | - Zahra Izanloo
- Center for Biomechanics and Motor Control (BMC), Department of Physical Education and Sport Science, University of Bojnord, Bojnord, Iran
| | | | - Deborah Falla
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, United Kingdom.
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Cannon J, Cambridge EDJ, McGill SM. Increased core stability is associated with reduced knee valgus during single-leg landing tasks: Investigating lumbar spine and hip joint rotational stiffness. J Biomech 2021; 116:110240. [PMID: 33494012 DOI: 10.1016/j.jbiomech.2021.110240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 12/08/2020] [Accepted: 01/04/2021] [Indexed: 10/22/2022]
Abstract
Knee valgus during landing has been identified as a strong correlate of ACL injury. Inappropriate trunk control during landing contributes to high knee valgus, with neuromuscular factors related to core stability postulated as the mechanism. This investigation probed the influence of trunk and hip mechanics, including joint stiffness, on knee mechanics, particularly high knee valgus. Specifically, this study quantified lumbar spine and hip joint rotational stiffness (a proxy for mechanical joint stability) during single-leg landing tasks known to be associated with injury risk, particularly in females. Kinematics, kinetics, and 24 channels of electromyography spanning the trunk and hip musculature were measured in 18 healthy female participants. Anatomically detailed EMG-driven musculoskeletal models quantified lumbar spine and hip joint rotational stiffness. The links between peak knee abduction angle and moment with lumbar spine and hip joint rotational stiffness were measured. Hip joint rotational stiffness influenced knee abduction across tasks (correlation coefficient ranging from -0.48 to -0.70, p < 0.05) to reduce valgus deviation. Similarly, transverse plane hip joint rotational stiffness during landings reduced knee abduction moment (R = -0.50, P = 0.03; R = -0.49, P = 0.04), and lumbar spine joint rotational stiffness reduced knee abduction angle and moment but did not consistently reach statistical significance. The control system uses stiffness to control motion. This study demonstrates the importance of proximal (lumbar spine and hip) joint rotational stiffness (i.e. core control stability) during single-leg landing to prevent knee abduction motion. Instantaneous core stability is achieved with the coordinated activation and stiffness of both trunk and hip muscles.
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Affiliation(s)
- Jordan Cannon
- Spine Biomechanics Laboratory, Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada; Musculoskeletal Biomechanics Research Laboratory, Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, California, USA.
| | - Edward D J Cambridge
- Spine Biomechanics Laboratory, Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
| | - Stuart M McGill
- Spine Biomechanics Laboratory, Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
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Determining the number of repetitions to establish isokinetic knee evaluation protocols specific to angular velocities of 60°/second and 180°/second. J Bodyw Mov Ther 2020; 25:255-260. [PMID: 33714505 DOI: 10.1016/j.jbmt.2020.12.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 12/21/2020] [Accepted: 12/29/2020] [Indexed: 11/20/2022]
Abstract
INTRODUCTION This study aims to develop a standard number of repetition at angular velocities of 60°/sec and 180°/sec and define the difference of number of repetitions between genders. METHOD One hundred ninety-six athletes (judo, volleyball, Greco-Roman wrestling, runners, and gymnastics) were involved. Concentric-concentric isokinetic muscle strength of the knee flexor-extensor muscles of the athletes were performed with an ISOMED 2000 isokinetic dynamometer. The evaluation test protocol consisted of 10 repetition of knee flexion-extension at 60°/sec and 30 repetitions at 180°/sec. RESULTS Athletes performed with maximal knee flexion strength at their second and third trial at 60°/sec and third-forth trial at 180°/sec. It was found that 2 repetitions and 2-3 repetitions were needed for knee extension peak torque at 60°/sec and 180°/sec respectively. The difference between the genders was significant at 60°/sec for knee flexion and extension on the dominant side; at 180°/sec for knee extension on the dominant and non-dominant side. It was determined that 3 repetitions for 60°/sec, 4 repetitions for 180°/sec were enough to determine peak torque values. DISCUSSION Optimal number of repetitions is crucial so that athletes could have the opportunity to reach maximal strength without unnecessary workload or waste of time. CONCLUSIONS Protocols involving 3 repetitions for 60°/sec, 4 repetitions for 180°/sec were enough to determine peak torque values. Gender of athletes should be considered when establishing isokinetic knee evaluation protocols.
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Acute Effect of Ankle Kinesio™ Taping on Lower-Limb Biomechanics During Single-Legged Drop Landing. J Sport Rehabil 2020; 30:689-696. [PMID: 33361493 DOI: 10.1123/jsr.2020-0212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 08/19/2020] [Accepted: 09/19/2020] [Indexed: 11/18/2022]
Abstract
CONTEXT Chronic ankle instability is documented to be followed by a recurrence of giving away episodes due to impairments in mechanical support. The application of ankle Kinesiotaping (KT) as a therapeutic intervention has been increasingly raised among athletes and physiotherapists. OBJECTIVES This study aimed to investigate the impacts of ankle KT on the lower-limb kinematics, kinetics, dynamic balance, and muscle activity of college athletes with chronic ankle instability. DESIGN A crossover study design. PARTICIPANTS Twenty-eight college athletes with chronic ankle sprain (11 females and 17 males, 23.46 [2.65] y, 175.36 [11.49] cm, 70.12 [14.11] kg) participated in this study. SETTING The participants executed 3 single-leg drop landings under nontaped and ankle Kinesio-taped conditions. Ankle, knee, and hip kinematics, kinetics, and dynamic balance status and the lateral gastrocnemius, medial gastrocnemius, tibialis anterior, and peroneus longus muscle activity were recorded and analyzed. RESULTS The application of ankle KT decreased ankle joint range of motion (P = .039) and angular velocities (P = .044) in the sagittal plane, ground reaction force rate of loading (P = .019), and mediolateral time to stability (P = .035). The lateral gastrocnemius (0.002) and peroneus longus (0.046) activity amplitudes also experienced a significant decrease after initial ground contact when the participants' ankles were taped, while the application of ankle KT resulted in an increase in the peroneus longus (0.014) activity amplitudes before initial ground contact. CONCLUSIONS Ankle lateral supports provided by KT potentially decreases mechanical stresses applied to the lower limbs, aids in dynamic balance, and lowers calf muscle energy consumption; therefore, it could be offered as a suitable supportive means for acute usage in athletes with chronic ankle instability.
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ELECTROMYOGRAPHIC ANALYSIS OF GLUTEAL RECRUITMENT: AN EXPLORATION OF ACTIVATION DURING JUMPING TASKS. Int J Sports Phys Ther 2020; 15:1019-1028. [PMID: 33344018 DOI: 10.26603/ijspt20201019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background Inability to maintain proper alignment of the pelvis and femur due to gluteal muscle weakness has been associated with numerous lower extremity pathologies. Therefore, many lower extremity rehabilitation and injury prevention programs employ exercises that target gluteal muscle strength and activation. While information regarding muscle activation during exercises that are typically done in the beginning stages of rehabilitation is available, evidence regarding the gluteal muscle activity during more functional and advanced exercises used during later stages of rehabilitation is sparse. Purpose To explore the recruitment of the gluteal muscles during jumping tasks in healthy participants to determine which jumping exercise best elicits gluteal muscle activation. Study Design Prospective cohort design. Methods Eighteen healthy recreational athletes (23.5 ± 3.8 years, 8M/10F, 67.56 ± 3.2 inches, 66.73 ± 9.5 kg) completed three trials of four jumping tasks: hurdle jump, split jump, V2 lateral jump, and cross-over jump in random order. Surface EMG electrodes were placed on each participant's bilateral gluteus medius (GMed) and maximus (GMax) to measure muscle activity during the jumping tasks. Maximal voluntary isometric muscle contraction (MVIC) was established for each muscle group in order to express each jumping task as a percentage of MVIC and allow standardized comparison across participants. EMG data were analyzed for all jumps using a root-mean-square algorithm and smoothed with a 62.5 millisecond time reference. Rank ordering of muscle activation during jumping tasks was performed utilizing the peak percent MVIC recorded during each jumping task. Results Three of the jumping tasks produced greater than 70% MVIC of the GMed muscle. In rank order from highest EMG value to lowest, these jumping tasks were: crossover jump (103% MVIC), hurdle jump (93.2% MVIC), and V2 lateral jump (84.7% MVIC). Two of the exercises recruited GMax with values greater than 70% MVIC. In rank order from highest EMG value to lowest, these jumping tasks were: hurdle jump (76.8% MVIC) and split jump (73.1% MVIC). Only the hurdle jump produced greater than 70% MVIC for both GMed and GMax muscles. Conclusions The jumping task that resulted in greatest activation of the GMed was the crossover jump, while hurdle jump led to the greatest activation of the GMax. The high %MVIC for the GMed during the crossover jump may be attributed to lack of maximal effort or lack of motivation during performance of maximal contractions during the manual muscle testing. Alternatively, substantial co-contraction of core muscles during the crossover jumping task may have led to higher values. Level of Evidence 2b Individual Cohort Study.
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Coupled Gluteus Maximus and Gluteus Medius Recruitment Patterns Modulate Hip Adduction Variability During Single-Limb Step-Downs: A Cross-Sectional Study. J Sport Rehabil 2020; 30:625-630. [PMID: 33217729 DOI: 10.1123/jsr.2020-0005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/22/2020] [Accepted: 09/07/2020] [Indexed: 11/18/2022]
Abstract
CONTEXT Examining the coordinated coupling of muscle recruitment patterns may provide insight into movement variability in sport-related tasks. OBJECTIVE The purpose of this study was to examine the relationship between coupled gluteus maximus and medius recruitment patterns and hip-adduction variability during single-limb step-downs. DESIGN Cross-sectional. SETTING Biomechanics laboratory. PARTICIPANTS Forty healthy adults, including 26 women and 14 men, mean age 23.8 (1.6) years, mean body mass index 24.2 (3.1) kg/m2, participated. INTERVENTIONS Lower-extremity kinematics were acquired during 20 single-limb step-downs from a 19-cm step height. Electromyography (EMG) signals were captured with surface electrodes. Isometric hip-extension strength was obtained. MAIN OUTCOME MEASURES Hip-adduction variability, measured as the SD of peak hip adduction across 20 repetitions of the step-down task, was measured. The mean amplitudes of gluteus maximus and gluteus medius EMG recruitment were examined. Determinism and entropy of the coupled EMG signals were computed with cross-recurrence quantification analyses. RESULTS Hip-adduction variability correlated inversely with determinism (r = -.453, P = .018) and positively with entropy (r = .409, P = .034) in coupled gluteus maximus/medius recruitment patterns but not with hip-extensor strength nor with magnitudes of mean gluteus maximus or medius recruitment (r = -.003, .081, and .035; P = .990, .688, and .864, respectively). CONCLUSION Hip-adduction variability during single-limb step-downs correlated more strongly with measures of coupled gluteus maximus and medius recruitment patterns than with hip-extensor strength or magnitudes of muscle recruitment. Examining coupled recruitment patterns may provide an alternative understanding of the extent to which hip neuromuscular control modulates lower-extremity kinematics beyond examining muscle strength or EMG recruitment magnitudes.
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Lim KH, Seo TB, Kim YP. Relationship between movement dysfunctions and sports injuries according to gender of youth soccer player. J Exerc Rehabil 2020; 16:427-431. [PMID: 33178644 PMCID: PMC7609848 DOI: 10.12965/jer.2040650.325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 09/21/2020] [Indexed: 11/22/2022] Open
Abstract
The purpose of this study is to investigate relationship between movement dysfunctions and sports injuries according to gender of youth soccer player. Thirty-eight middle school soccer players participated in this study and they were divided into male (n=19) and female (n=19) groups. The Functional Movement Screen (FMS) and the Quadriceps-angle (Q-angle) during single-leg squat were analyzed for identifying imbalance and asymmetry of the body, and sports injury questionnaire was examined for 6 months after FMS test. The number of sports injuries did not show significant difference between youth male and female soccer athletes. In FMS results, the scores of overhead squat, hurdle step, in-line lunge, shoulder mobility, active straight leg raise, and rotary stability and the total scores were no significant differences between gender, but the score for the trunk stability push-up was significantly higher in male group than female group. There was no significant difference of Q-angle values between the left and right legs, but Q-angle value between youth male and female groups significantly showed interaction. Therefore, the present data suggested that FMS and Q-angle during single-leg squat might be indicators to predict and/or prevent sports injury in youth male and female soccer players.
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Affiliation(s)
- Ki-Hoon Lim
- Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Korea
| | - Tae-Beom Seo
- Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Korea
| | - Young-Pyo Kim
- Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Korea
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