Fig 1.
Leg curl at 30° knee flexion (a), leg curl at 90° knee flexion (b), hip extension with extended knee angle (c), and hip extension with flexed knee angle (d).
All movements were performed at MVIC and at 40% of MVIC. Note: The solid arrow indicates the direction of force produced by the subject. The broken arrow indicates the direction of force applied by the examiner. The hip joint was set at the neutral position in the frontal and sagittal planes during all trials. The examiner asked subjects to maintain their ankle in neutral (90°) position.
Fig 2.
The muscle length of BFlh and ST was determined as the length from the ischial tuberosity to the prominence of the lateral- and medial-epicondyle, respectively. The proximal portion of the BFlh and ST were set at 30% of each muscle length distally from the IT. The distal portion of the BFlh and ST were set at 30% and 50% of each muscle length proximally from the lateral- and medial-epicondyle. The examiner palpated the muscle belly of each muscle during the leg curl at 30° and 90°, then confirmed that each of electrode was located on each muscle accurately.
Table 1.
The ICC(1.1) between two bouts of MVIC force and EMG data during 40% MVIC trial.
Table 2.
The BFlh/ST ratio in proximal and distal regions among movement types at different loads.
Table 3.
The P/D ratio of NEMG in BFlh and ST muscles among movement types.
Table 4.
The NEMG of GM of LC30, LC90, and HE0 compared to the value of HE90.