Figure 8From: The influence of electromyographic biofeedback therapy on knee extension following anterior cruciate ligament reconstruction: a randomized controlled trial Comparison of percentage vastus medialis contraction (% μV-EMG) within two groups (mean value ± SD) pre- and postoperative 6 weeks follow up (preop. = preoperative, 1., 2., 4., and 6. pop. W. = 1., 2., 4., and 6. postoperative week). Back to article page