| Summary: | 碩士 === 國立臺灣體育學院 === 競技運動學系碩士班 === 98 === 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.
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