Fig. 2

a Single-leg hop test and kinetics graph. The single-leg hop test for distance was performed as previously described [18]. Patients were instructed to stand on one leg and to position their toes against a mark on the floor. They were then instructed to hop forward as far as possible and to land on the same leg. b Drop vertical jump and kinetics graph. Subjects were instructed to drop off a 30-cm box and perform a maximum jump after landing. The box distance was adjusted so that the patient could land with one foot on each platform. c Vertical hop test and kinetics graph. Vertical hop test was performed (Fig. 2c) with the patient standing on both platforms and being instructed to hop using his arms as countermovement. Max maximum