大專甲組男性排球運動員下肢不對稱性與爆發力表現之探討

Abstract

目的：探討大專甲組男性排球運動員下肢身體組成與功能性測試的不對稱性，以及下肢不對稱性與連續爆發力之相關性。方法：共招募 20 名大專甲組男性排球運動員，測量其肌肉量、體脂率、單腳反向跳高度與巴士可 15 秒連續跳躍，以成對樣本 t 檢定比較左右腳肌肉量、體脂率及單腳反向跳高度之差異，並以皮爾森積差相關分析來檢測下肢不對稱性與巴士可連續跳躍疲勞指數之相關。結果：受試者之下肢兩側肌肉量、單次單腳反向跳躍高度達到顯著差異 (肌肉量 p = .008；單腳反向跳躍高度 p = .019)，反向跳不對稱指數與連續動力垂直跳之疲勞指數達到顯著中度相關 (p = .014, r = .545)。結論：大專甲組男性排球運動員具有下肢肌肉量與功能性測試之不對稱性，而下肢雙側不對稱越高，連續跳躍高度遞減幅度越大。未來研究可針對不同運動專項之下肢雙側不對稱性，以及雙側不對稱性對於其他功能性測試的影響進行探討。  Purpose: To examine the asymmetry of lower extremity body composition and functional tests and to investigate the relationship of lower extremity asymmetry and power in male collegiate volleyball players. Methods: Twenty Division I male collegiate volleyball players were recruited. Muscle mass, body fat, single leg countermovement jump, and the Bosco 15s vertical jump tests were performed. The paired-t test was used to compare the lower extremity muscle mass, lower extremity fat mass, and single leg countermovement jump height between the right and left legs. Pearson product-moment correlation coefficient was used to analyze the relationship between the lower extremity asymmetry and the Bosco jump fatigue index. Results: The lower extremity asymmetries in muscle mass and single leg countermovement jump height were found (muscle mass: p = .008, SLCMJ: p = .019). The asymmetry index in single leg countermovement jump height was positively correlated with the Bosco jump fatigue index (p = .014, r = .545). Conclusion: The asymmetries of lower extremity muscle mass and functional tests existed in male collegiate volleyball players. Higher bilateral asymmetry resulted in greater decrease in the continuous jump height. Future study could investigate the bilateral asymmetry in different sports and the effects of bilateral asymmetry on other functional tests.