스텝업 운동시 무릎넙다리 통증 증후군이 근활성도에 미치는 영향

Abstract

Purpose: The purpose of this study was to examine EMG activities and VMO/VL ratio of the vastus medialis oblique, and vastus lateralis during step up exercise according to ankle and knee positions in soccer players with patellofemoral pain syndrome. Methods: Ten subject(patellofemoral pain syndrome, PFPS: n=8 and without PFPS, non PFPS; NPFPS: n=8)perfomed step up exercise at each knee and ankle position(knee flexion 30°, 60°, and 90°, ankle internal rotation 30°, neutral, and external rotation 30°) while EMG activity was collected. The EMG signals were expressed by the % maximal voluntary isometric contraction(%MVIC) values. Statistical analysis consisted of two way repeated measures analysis of variance with post hoc analysis. Results: Main results were as follows: 1) EMG of VMO, and VL was tend to be lower in PFPS compared to NPFPS. 2) EMG of VMO and VL with knee flexrion 60° was significantly higher the results with knee flexion 30°, and 90°. VMO and VL with ankle external rotation 30° was significantly higher the results with internal rotation 30° and neutral position. conculusion: Considering the EMG activity was redused due to the to the PFPS and that performing step up with knee flexion 60° with ankle external rotation 30° position may provide the most effective condition for patients with patellofemoral pain syndrome.