本篇研究目的旨在探討排球選手股四頭肌及大腿後肌等速肌力與下肢爆發力之研究，研究之問題主要分析排球選手股四頭肌及大腿後肌等速向心肌力及下肢爆發力差異，並比較慣用腳與非慣用腳是否有顯著差異及瞭解股四頭肌/大腿後肌等速最大肌力與下肢爆發力之間的相關程度；以40名排球選手(20名大專選手及20名高中選手)參與本研究，使用Biodex等速測力機測試排球選手於角速度60、120、180、300°/sec股四頭肌及大腿後肌等速向心最大肌力，下肢爆發力測試：以Monark腳踏車測功器進行30秒溫蓋特無氧動力測驗、立定垂直跳及立定跳遠的測試。主要結果如下：(一)兩組選手股四頭肌及大腿後肌最大等速向心肌力隨測試速度增加而減低的趨勢。(二)兩組選手大腿後肌與股四頭肌肌力比值隨著角速度的增加有提高的趨勢。(三)高中選手大腿後肌在60°、120°/sec慣用腳與非慣用腳兩腳達顯著差異；兩組選手在慣用腳與非慣用腳兩腳差異平均約在5%左右。(四)股四頭肌及大腿後肌等速向心肌力與立定垂直跳、立定跳遠呈顯著的正相關(p<.05)。經由本篇研究結果，排球肌力數值可提供教練及球員，在運動選材、復健治療、訓練計劃安排、調整訓練的參考依據。

　　Purpose：The purpose of this study was to examine the relationships between isokinetic strength of quadriceps/hamstring femoris and anaerobic power of lower extremities in volleyball players. The main analysis focused on the comparison of maximal isokinetic concentric strength and anaerobic power of lower extremities between college and high school players, and identified the relationships between the maximal isokinetic strength of quadriceps/hamstring femoris and anaerobic power of lower extremities. Method：Forty volleyball players (20 college players and 20 high school players) participated in this study. A Biodex isokinetic dynamometer was used to evaluate maximal concentric strength of participants. Angular velocities were set at 60, 120, 180 and 300°/sec. A Monark bicycle ergometer was used to conduct the 30-second Wingate test to measure anaerobic power of lower extremities, standing vertical jump test and standing long jump test in order to measure explosive power. Results：The main results were as follows: Two groups in quadriceps and hamstring maximal isokinetic strength were decreased when the velocities were increased. H/Q ratios were increased when the velocities were increased in both groups. Hamstrings strengths at 60 and 120° /sec in high school players between dominant and non-dominant legs were significantly different, and about 5% differences dominant and non-dominant legs in both groups were found. Relationships of quadriceps / hamstring isokinetic strength, vertical jump, and standing long jump had significantly positive correlations (p <.05). According to this study, the volleyball values may provide for coaches and the players, in the selection of elite volleyball players, training plan arrangement, and adjustment.