| Summary: | 碩士 === 國立體育大學 === 競技與教練科學研究所 === 105 === Purpose: the purpose of this study is to investigate the correlation of plyometric performance and weight loading, with subjects of professional female sprinter. Methods: On force platform, each of the subject conducted drop jump with the load of 0%, 3%, 5%, 7%, and 10% of bodyweight to collect the data of impulse, height and rate of force development (RFD) as variables to measure apply force with one-way ANOVA, repeated measures to compare with different weight loading (α=.05). Results: The results of this study shown that the correlation of different weight loading and drop jump RFD, 0%, 24.85 ± 25.06 (kg/s), 3%, 20.68 ± 31.00 (kg/s), 5%, 19.67 ± 23.75 (kg/s), 7%, 19.03 ± 28.20 (kg/s), and 10%, 19.11 ± 23.55 (kg/s) are no significant difference (P＞.05). The correlation of different weight loading and drop jump impulse, 0%, 3%, 7%, and 10% are significant difference (P＜.05); 5% and 10% are significant difference (P＜.05); 0 % and 10% are no significant difference (P＞.05). The correlation of different weight loading and drop jump height, 0%, 3% and 10% are significant difference (P＜.05); comparison of 5% and 7% with other three weight are no significant difference (P＞.05). Conclusion: This study discover that different weight loading of plyometric drop jump, with the weight increasing, the RFD is first growth then decline and the movement becomes slowly which also decreases the height. Results indicate that when developing explosive training programs, should consider the design of force and muscle strength for sprint athletes to make better training effect.
Keywords: drop jump, force platform, rate of force development, impulse, flight time
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