Outcome assessments
lower extremity muscle strength, knee flexors
The Myoflet3 handheld dynamometer (Boston, USA) was used to assess lower extremity muscle strength as the primary outcome in this study. The muscle strength test was started with knee flexors in the prone position with a knee flexion of 90°. The knee extensor test was performed in the short sitting position with arms across the chest to prevent compensatory movement. The strength test was performed three times in each position, and the average values were reported as the muscle strength.Performance-based measures of function were performed as recommended by the OARSI