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자료유형
학술저널
저자정보
저널정보
한국운동생리학회 운동과학 운동과학 제28권 제4호
발행연도
2019.1
수록면
373 - 380 (8page)

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PURPOSE: The purpose of this study was to determine the effect of vastus lateralis muscle fascicle length on isokinetic muscle strength and dynamic balance in youth soccer players. METHODS: Fourteen youth soccer players were divided into long fascicle length group (LFG, n=7) and short fascicle length group (SFG, n=7) by fascicle length of vastus lateralis muscle using ultrasound imaging. And measurements of muscle thickness, fascicle pennation angle, and physiological cross-sectional area were taken at the same location. Additionally, maximal isokinetic strength of knee extensors was assessed at 60°/sec and 120°/sec and a Y-balance test was completed. RESULTS: Fascicle length and ratio of fascicle length/lower limb length were significantly greater in LFG than that in SFG (p<.001). Fascicle pennation angle (p<.01) and physiological cross-sectional area (p<.05) were significantly greater in SFG than that in LFG. The isokinetic maximal strength of knee extensors at 120°/sec was significantly greater in SFG than that in LFG (p<.05). The composite score of Y-balance was significantly greater in SFG than that in LFG (p<.05). CONCLUSIONS: Our results show differences in architectural characteristics of the vastus lateralis. Further, the maximal isokinetic strength of knee extensors at 120°/sec and the ability of dynamic balance were greater in short vastus lateralis fascicle length of youth soccer players.

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