Efficacy of Electromyographic Biofeedback Strength Training on Quadriceps Femoris Muscles In Pattelofemoral Pain Syndrome

Abstract

The aims of this study were to evaluate the effectiveness of Electromyographic-biofeedback as an add-on therapy with isometric contraction exercise on quadriceps strength and pain in patient with pattelofemoral pain syndrome. Thirty patients (9 men and 21 women) with pattelofemoral pain syndrome. Patients were randomly placed into two groups: biofeedback group (n=15) and a control group (n=15). The biofeedback group received electromyographic-biofeedback guided isometric contraction exercise program for 5 days a week for 3 week, whereas the control group received aisometric contraction exercisesprogram only. Isometric quadriceps strength improved significantly at the end of 3 week, compared with the pretreatment values in both the groups. On between group comparisons, the isometric quadriceps strength in biofeedback group, at the end of 3 week and after 2 week follow-up i.e. on 5th week were significantly higher than those of control group (p less than 0.05). The addition of electromyographic-biofeedback toisometric exercise program has been shown to produce greater gains in isometric quadriceps strength, thereby reduce pain than isometric exercise alone over a 3 week period. This study may provide a rationale for the clinical use of electromyographic-biofeedback.