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KMID : 1195020160120020031
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Archives of Orthopedic and Sports Physical Therapy
2016 Volume.12 No. 2 p.31 ~ p.41
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The Influence of Applied Resistance to Hip Joint During Single Limb Squat on the Muscle Activation of Qudriceps muscle in Patellofemoral Pain Syndrome Patient
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Lee Sung-Eun
Kim Jong-Woo
Hwang Byeong-Jun
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Abstract
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This study aimed to investigate the change in the activity of lower limb muscles when patients with patellofemoral pain syndrome performed single limb squats with resistance applied from different directions to their hip joints. Thirty-three subjects with patellofemoral pain syndrome performed single limb squats with knees flexed at 60° and resistance from three different directions (i.e., abductive, adductive, and without force) applied to their hip joints in each trial. Muscle activation was measured with surface electromyography from the vastus medialis oblique, vastus lateralis oblique, and vastus medialis oblique or vastus lateralis oblique. Comparative analyses were performed on the acquired data. The activation of the vastus medialis oblique showed statistically significant changes (p<.05) during exercise while the activation of the vastus lateralis oblique did not (p>.05). The activation of the vastus medialis oblique changed significantly between conditions of adductive resistance and without force and between conditions of abductive and adductive resistance. Therefore, a functional exercise such as a single limb squat with adductive resistance may serve as an efficient therapeutic activity for patients with patellofemoral pain syndrome. We expect to include rehabilitation treatments and training in exercise motion to generate further interest in this approach.
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KEYWORD
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single limb squat, patellofemoral pain syndrome, qudriceps muscle
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