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作者对短跑动作周期不同阶段的 16项运动生物力学参数进行了相关与因子分析。研究发现 :16项生物力学参数之间的关系非常复杂 ,除少数参数外 ,每个参数都与其它 4个或 4个以上的参数有明显相关关系 (p≤ 0 .0 5 0 .0 1) ,这说明短跑各阶段的动作是一个对立统一的周期运动 ,需要高度协调的发展。因子分析发现 :在 16项运动生物力学参数中 ,后蹬角度、步频、步长、摆动腿速度、扒地速度等参数是主因子。根据研究结果和短跑的生物力学特点 ,作者认为 ,通过高速协调的摆腿与扒地动作 ,即可加快步频 ,又获得适宜的后蹬角度 ,提高和改善支撑阶段 (前蹬与后蹬 )的经济性和实效性 ,达到更好的组合效果。
The authors conducted a correlation and factor analysis of 16 exercise biomechanical parameters at different stages of the sprint cycle. The study found that: the relationship between the 16 biomechanical parameters is very complex, with the exception of a few parameters, each parameter is significantly correlated with other 4 or more parameters (p≤0.050.1) . This shows that the movements at all stages of the sprint are a periodical movement that is opposite to each other and requires highly coordinated development. Factor analysis found that among the 16 sports biomechanical parameters, the parameters such as pedaling angle, stride frequency, stride length, swinging leg speed, and stepping speed are the main factors. According to the research results and the biomechanical characteristics of the sprint, the author believes that through the high-speed coordination of the swing leg and the chopper movement, you can speed up the pace, but also get appropriate rear pedal angle, improve and improve the support phase (front pedal and rear pedal) The economy and effectiveness, to achieve a better combination of results.