The effects of closed kinetic chain exercise using EMG biofeedback on PFPS patients' pain and muscle function

Abstract

This study aimed to examine the effects of closed kinetic chain exercise using electromyography (EMG) biofeedback for selective strengthening of the vastus medialis oblique (VMO) on patllofemoral joint pain and functional characteristics of patllofemoral joint muscles. The subjects of this study were 30 patellofemoral pain syndrome (PFPS) patients and they were equally and randomly assigned to a control group (I), a closed kinetic chain exercise group (II), and an EMG biofeedback closed kinetic chain exercise (III). They received intervention three times per week (for 30 minutes per each time) for six weeks. Measurement methods included visual analogue scale (VAS) and EMG. According to the study result, there were significant differences in groups II and III compared to group I in VAS (p