Fig. 1

Top view of hand-held dynamometry measurement setup. Children were positioned on their left side on a treatment table, with the hip of the measured (right) leg at 70° flexion (a). Pelvis and upper leg were tightly secured – the upper leg with a bandage (b) and the pelvis with an adjustable frame (c1) and foam blocks on both sides of the trunk (c2). The lower leg was positioned on a low-friction movable plate (d). The lower leg was manually moved with a hand-held force transducer (e) through its range of motion with stops for 10 s every 5°