Colon transit time according to physical activity and characteristics in South Korean adults

Table 1 Physical characteristic of the participants

Variable	Male (n = 23)	Female (n = 24)	Total (n = 47)	P value
Age (yr)	37.3 ± 5.8	35.9 ± 5.6	36.0 ± 5.9	0.108
Height (cm)	172.1 ± 5.1	159.6 ± 6.3	165.2 ± 8.5	< 0.001
Weight (kg)	75.6 ± 12.5	55.2 ± 6.8	64.4 ± 14.1	< 0.001
BMI (kg/m2)	24.5 ± 3.5	21.7 ± 2.5	23.4 ± 3.5	< 0.001
LBM (kg)	57.1 ± 15.3	41.1 ± 5.0	48.3 ± 13.5	< 0.001
BF (%)	21.1 ± 8.7	25.5 ± 3.5	23.5 ± 6.7	0.009

Data are presented as mean ± SD. BMI: Body mass index; LBM: Lean body mass; BF: Body fat.

Table 2 Physical activity amount and intensity of the subjects

Variable	Male	Female	Total	P value
TEE (kcal)	637.6 ± 44.3	464.3 ± 64.9	542.4 ± 54.9	0.003
TAC (count)	247 017 ± 75 022	178 014 ± 75 998	212 515.5 ± 75 501	0.003
EEL (kcal)	148.5 ± 6.9	120.0 ± 16.8	133.1 ± 16.8	0.006
EEM (kcal)	472.0 ± 36.2	281.4 ± 22.2	367.4 ± 22.2	< 0.001
EEV (kcal)	24.5 ± 6.7	11.1 ± 47.8	17.8 ± 13.8	0.214

Data are presented as mean ± SD. TEE: Total energy expenditure; TAC: Total activity count; EEL: Energy expenditure of light intense activity; EEM: Energy expenditure of moderate intense activity; EEV: Energy expenditure of vigorous intense activity.

Table 3 Daily macro-nutrients intake of the subjects

Variable	Male	Female	Total	P value
Totalenergy (kcal)	2193.1 ± 259.2	2091.5 ± 229.2	2147.2 ± 233.6	0.292
Protein (g)	85.0 ± 18.6	82.5 ± 20.9	83.6 ± 19.6	0.493
Fat (g)	65.5 ± 23.3	51.2 ± 17.4	59.0 ± 21.9	0.010
Carbohydrate (g)	338.8 ± 71.7	298.5 ± 42.4	305.8 ± 61.2	0.054
Fiber(g)	8.1 ± 4.5	9.9 ± 4.7	8.9 ± 4.6	0.133
Water (g)	1714.3 ± 329.4	1164.7 ± 263.6	1227.0 ± 286.8	0.009

Data are presented as mean ± SD.

Table 4 Segmental colon transit time of the subjects

Variable	Male	Female	Total	P value
LCTT (h)	0.9 ± 2.2	1.1 ± 3.0	1.0 ± 2.6	0.592
RCTT (h)	3.5 ± 4.9	10.0 ± 11.6	6.8 ± 9.6	0.023
RSCTT (h)	4.4 ± 4.7	13.6 ± 12.5	9.0 ± 8.6	0.004
TCTT (h)	8.8 ± 9.4	24.7 ± 23.6	16.8 ± 16.2	0.002

Data are presented as mean ± SD. RCTT: Right colon transit time; LCTT: Left colon transit time; RSCTT: Recto-sigmoid colon transit time; TCTT: Total colon transit time.

Table 5 Correlations between the total colon transit time and parameters

Variable	Male	Female	Total1
Physicalcharacteristics
Age	0.060	-0.112	-0.067
Height	0.071	-0.157	-0.108
Weight	-0.344	-0.014	-0.098
BMI	-0.424	0.127	-0.031
LBM	-0.053	-0.107	-0.050
BF	-0.243	0.149	0.051
Physicalactivity
TEE	-0.244	-0.022	-0.031
TAC	-0.191	-0.164	-0.180
EEL	-0.067	-0.211	-0.182
EEM	-0.197	-0.092	-0.101
EEV	-0.256	0.092	0.078
Macro-nutrientintake
Energy	0.196	0.158	0.290
Protein	-0.102	-0.247	-0.123
Fat	0.024	-0.155	-0.008
Carbohydrate	0.346	-0.221	0.250
Fiber	-0.417	-0.655	-0.545
Water	-0.266	-0.326	-0.257

¹Adjusted for gender. BMI: Body mass index; LBM: Lean body mass; BF: Body fat; TEE: Total energy expenditure; TAC: Total activity count; EEL: Energy expenditure of light intense activity; EEM: Energy expenditure of moderate intense activity; EEV: Energy expenditure of vigorous intense activity.