AbstractObjective: To compare the efficacy of posterolateral hip muscle strengthening versus quadriceps strengthening in reducing pain and improvinghealth status in persons with patellofemoral pain (PFP).Design: Comparative control trial.Setting: Rehabilitation facility.Participants: Persons with a diagnosis of PFP (NZ36; 18 men, 18 women).Interventions: Patients were alternately assigned to a posterolateral hip muscle strengthening group (9 men and 9 women) or a quadricepsstrengthening group (9 men and 9 women). The posterolateral hip muscle strengthening group performed hip abductor and external rotatorstrengthening exercises, whereas the quadriceps strengthening group performed quadriceps strengthening exercises (3 times a week for 8wk).Main Outcome Measures: Pain (visual analog scale [VAS]) and health status (Western Ontario McMaster Universities Osteoarthritis Index[WOMAC]) were assessed at baseline, postintervention, and 6-month follow-up.Results: Significant improvements in VAS and WOMAC scores were observed in both groups from baseline to postintervention and baseline to6-month follow-up (P<.001). Improvements in VAS and WOMAC scores in the posterolateral hip exercise group were superior to those in thequadriceps exercise group postintervention and at 6-month follow-up (P<.05).Conclusions: Although both intervention programs resulted in decreased pain and improved function in persons with PFP, outcomes in theposterolateral hip exercise group were superior to the quadriceps exercise group. The superior outcomes obtained in the posterolateral hip exercisegroup were maintained 6 months postintervention
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