하지거장운동과 대퇴사두근 등척성운동시대퇴사두근의 활동전위
The. Effects of Straight Leg Raising Exercise and Quadriceps Setting Exercise on Electromyographic Activity of the Quadriceps Muscle
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The purposes of this study were to compare the electromyographic activities from therectus femoris, vastus medialis oblique portion, vastus medialis longitudinal portion,and vastus lateralis during straight leg raising (SLR) and quadriceps setting (QS)exercise and to determine which exercise is more effective to selectively strengthenthe vastus medialis. Thirty two healthy subjects <19 men, 13 women) participated inthe study. All participants performed SLR and QS exercises while electromyographicactivity was recorded from EMG surface electrodes. Statistical analysis demonstratedsignificantly greater values for the vastusmedialis oblique portion, vastus medialislongitudinal portion, and vastus lateralis activities during QS exercise than for thoseduring SLR exercise. However, the rectus femoris muscle activity between SLR andQS exercises was not significantly different. The ratios of vastus lateralis to vastusmedialis during SLR and QS exercise were not significantly different. These resultsshow that QS exercise is more effective for strengthening the quadriceps muscle onthe whole than the SLR exercise. As for selective methods of strengthening vastusmedialis specifically, both SLR and QS exercises are useful.
Abstract
The purposes of this study were to compare the electromyographic activities from therectus femoris, vastus medialis oblique portion, vastus medialis longitudinal portion,and vastus lateralis during straight leg raising (SLR) and quadriceps setting (QS)exercise and to determine which exercise is more effective to selectively strengthenthe vastus medialis. Thirty two healthy subjects <19 men, 13 women) participated inthe study. All participants performed SLR and QS exercises while electromyographicactivity was recorded from EMG surface electrodes. Statistical analysis demonstratedsignificantly greater values for the vastusmedialis oblique portion, vastus medialislongitudinal portion, and vastus lateralis activities during QS exercise than for thoseduring SLR exercise. However, the rectus femoris muscle activity between SLR andQS exercises was not significantly different. The ratios of vastus lateralis to vastusmedialis during SLR and QS exercise were not significantly different. These resultsshow that QS exercise is more effective for strengthening the quadriceps muscle onthe whole than the SLR exercise. As for selective methods of strengthening vastusmedialis specifically, both SLR and QS exercises are useful.