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Abstract
Patellofemoral osteoarthritis (PF OA) is a common condition in outpatient physical therapy. The muscle imbalance between the vastusmedialis oblique (VMO) and vastuslateralis (VL) muscles is one of the main factors leading to the development of this condition. The disparity in research and the necessity to add to the existing literature base led to the development of this study. To compare between squatting and squatting with hip adduction in treatment of PF OA. Thirty female patients suffering from PF OA were randomly assigned into two equal groups, fifteen patients in group (A) received squatting exercise and fifteen patients in group (B) received squatting with hip adduction exercise. Patients in both groups received a traditional physical therapy treatment in the form of hamstring stretching, pulsed ultrasound and TENS. Interventions were given for three days a week for four weeks. Their pain on numerical rating scale (NRS), performance of functional activities by kujala scale and VMO, VL amplitude and VMO: VL ratio by quantitative Electromyography (QEMG) using surface electrodes were considered before and after intervention