| （广州金融高等专科学校 基础部，广东 广州510521） 摘要：从影响跑速的基本因素和支撑阶段的运动学参数两个方面对中长跑途中跑适宜步长进行了分析。结果表明：步长指数和步频能力与适宜步长的确定直接相关，而支撑时间与腾空时间的比值、支撑腿离地瞬间膝关节角度、支撑阶段身体重心水平位移距离等运动学参数则是影响适宜步长的主要因素。采用专项耐力指数对运动员的专项能力进行了分级，给出了不同专项能力水平运动员步长指数的适宜范围。 关键词：中长跑； 途中跑； 适宜步长 中图分类号： G822.219 文献标识码：A 文章编号：1006-7116(2003)05-0118-03 |
LIAO Yu-shan
| (Department of Basic Courses,Guangzhou Finance College,Guangzhou 510521,China) Abstract:The paper explains a term-stride length of middle-distance run from two aspects, one is the basic factors infect on speed,the other is kinematics parameter of support period.It shows that stride length has direct relationship with stride index and stride frequency.The main reasons to infect on stride length are the ratio of time of support and empty out,the angle of knee when the support leaves ground and so on. At last, the paper suggests stride length for runners with different ability. Key words:middle-distance run； midway running； stride length |
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