Figure 3From: Measurement of muscle length-related electromyography activity of the hip flexor muscles to determine individual muscle contributions to the hip flexion torqueSchematic diagram of hip flexion task. During hip flexion tasks, the trunk and left thigh were fixed to the bed by straps, with the knee joints flexed to 90° and the right hip joint angle set at -10°, 0°, 30°, and 60°. The right thigh was attached to a dynamometer.Back to article page