| 沙滩排球上步扣球踏跳阶段的时相特征 |
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| 引用本文： | 李世明.沙滩排球上步扣球踏跳阶段的时相特征[J].北京体育大学学报,2004,27(9):1264-1265. |
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| 作者姓名： | 李世明 |
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| 作者单位： | 烟台师范学院体育学院,山东,烟台,264025 |
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| 基金项目： | 烟台师范学院校科研和教改项目 |
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| 摘 要： | 时相特征是影响沙滩排球扣球起跳质量的重要因素,运用运动生物力学手段对其进行比较研究发现:沙滩排球上步扣球踏跳阶段依据人体下肢肌肉工作形式以及重心速度随时间的变化可划分为5个部分,即加速缓冲、减速缓冲、等长制动、加速蹬伸和减速蹬伸.其中沙滩排球加速缓冲与减速缓冲时间均过长,不利于缩短起跳时间,影响沙滩排球扣球的起跳效果.另外,沙滩排球扣球起跳的加速蹬伸时间占起跳时间的比重太小是影响在沙滩上起跳时间结构的关键因素.
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| 关 键 词： | 沙滩排球 扣球 踏跳 时相 沙滩排球 排球扣球 踏跳阶段 时相特征 volleyball Beach Jumping Phase 时间结构 起跳效果 起跳时间 缓冲时间 蹬伸 制动 划分 变化 重心速度 工作形式 下肢肌肉 发现 |
| 文章编号： | 1007-3612(2004)09-1264-03 |
| 修稿时间： | 2003年11月6日 |
Characteristics of Phase in Spike Jumping in Beach volleyball |
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| LI Shi-ming.Characteristics of Phase in Spike Jumping in Beach volleyball[J].Journal of Beijing Sport University,2004,27(9):1264-1265. |
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| Authors: | LI Shi-ming |
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| Abstract: | Phase characteristics are important to the jumping quality of spike in beach volleyball, and we study it with the means of sports biomechanics. On the basis of the working form of muscle of lower limb and velocity variety with time of gravity center of the human body, the jumping phase is divided into 5 parts, i.e. accelerating cushion, deceleration cushion, balance brake, accelerating thrust and decelerating thrust. The duration of both accelerating cushion and deceleration cushion are so short that they spoil the effect of jumping for prolonging the duration of jumping. In addition, the proportion of the duration of accelerating thrust to jumping time is smaller so as to ruin the structure of jumping time of spike in beach volleyball. |
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| Keywords: | beach volleyball spike jumping phase |
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