Muscle activity of the vastus medialis obliquus during squat motion afterstatic stretching of the tensor fasciae latae

摘要

[Purpose] The purpose of this study was to investigate the changes of muscle activityduring squat motion after stretching the tensor fasciae latae muscle. [Participants andMethods] The participants comprised 19 healthy males. The test muscles were the vastusmedialis obliquus and vastus lateralis. The participants performed the squat motion beforeand after stretching the tensor fasciae latae. We measured the muscle activities and theonset timing of the vastus medialis obliquus relative to that of the vastus lateralisduring squat motions. [Results] The onset timing of the vastus medialis obliquus relativeto that of the vastus lateralis was decreased, and the vastus medialis obliquus activityand vastus medialis obliquus/vastus lateralis activity ratio were increased afterstretching the tensor fasciae latae. [Conclusion] This study revealed that stretching ofthe tensor fasciae latae increases the relative vastus medialis obliquus muscleactivity.