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Abstract ▼ AI-Helper

The purpose of this study was to investigate the surface EMG analysis of the vastus medialis obilique(VMO), vastus lateralis(VL) and rectus femoris(RF)muscles between involved side and uninvolved side in patients with patellofemoral pain syndrome during isokinetic exercise. Twelve subjects(8 male, 4...

The purpose of this study was to investigate the surface EMG analysis of the vastus medialis obilique(VMO), vastus lateralis(VL) and rectus femoris(RF)muscles between involved side and uninvolved side in patients with patellofemoral pain syndrome during isokinetic exercise. Twelve subjects(8 male, 4 female aged 19.4±5.1, weight 63.2±4.1) had a diagnosis of patellofemoral pain syndrome by sports medicine doctor. All tests were performed maximal voluntary contraction of quadriceps femoris muscle according to Biodex Ⅲ at 60°/sec, 300°/sec. The electromyographic analysis of vastus lateralis, rectus femoris and vastus medialis during isokinetic exercise were investigated using bipolar surface electrodes. The isokinetic measurements were made under the same conditions. The peak torque of quadriceps at 60°/sec was not significantly different, but 300°/sec different. The root mean square of rectus femoris and vastus lateralis at 60°/sec, 300°/sec was not significantly different(p＞0.05), differences(p＜0.05) was found in root mean square of vastus medialis oblique at 60°/sec, 300°/sec between involved side and uninvolved side. The results suggest that patella moves toward the outside because the vastus medialis muscle is weaker than other muscles when using isokinetic exercise at 60°/sec, 300°/sec in patients with patellofemoral pain syndrome. If coaches and athlets understand the property of patellofemoral pain syndrome such as result in this study, it can help the early recovery of injury and the improvement of performance.

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