Calf muscle strength in the injured and noninjured legs in the control group that underwent surgery is shown in Table 2. Preoperatively, the injured side had significantly lower concentric plantar flexion strength at 90 and 225 deg/sec (18.7% and 23.7%, respectively) and lower eccentric plantar flexion strength (13.6%) than the noninjured side. At week 24 postoperatively, the injured side had significantly lower concentric plantar flexion strength at 90 and 225 deg/sec (14.5% and 15.2%, respectively) and lower eccentric plantar flexion strength (15.7%) than the noninjured side.