Effectiveness of exercise for osteoarthritis of the knee: A review of the literature

Figure 1 Medx knee machine (Back In Action, CA, USA). The strength of the knee extensor and flexor muscles was measured with a Medx knee machine. Each patient underwent isokinetic and isometric testing of the knee extensor and flexor muscles. Patients were positioned on the Medx knee machine chair with stabilization supports across the pelvis and distally over the thighs. Patients gripped the side of the chair and leaned back against the backrest which was inclined posteriorly to an angle of 90° above horizontal. The isometric torques of the both knee extensor and flexor muscles were measured with the both legs together at 6 points between 0° and 120° and then the maximum peak torque values of the knee extensor and flexor muscles were evaluated.