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起跳是一切跳跃动作的所有技术环节中最重要的关键(环节)技术,起跳决定了人体腾空后的运动速度相方向,也就决定了人体质心在空中的运动轨迹,所以在有关跳跃运动研究中无不把起跳动作作为重点进行深入考察。起跳速度快,从起跳脚着地到蹬离只有0.1秒时间,在如此短暂的时间里完成推动人体腾空的任务,使人们不得不对影响起跳效果的诸因素进行研究。以往认为影响背越式跳高起跳效果的因素为蹬伸力量、蹬伸距离、起跳角度、起跳时间,而将摆动动作。特别是摆动腿的摆腿动作忽视了,本文就摆腿的摆动作用及摆腿方向进行探讨一下。
Take-off is the most important key (link) technology in all the technical links of all the jumping movements. Since the take-off determines the direction of the moving speed of the human body after airborne, it also determines the movement trajectory of the human body centroid in the air. Therefore, In all the take-off movements as the focus of an in-depth investigation. Take-off speed is fast, from the take-off foot to pedal off only 0.1 seconds, in such a short period of time to complete the task of promoting the human body vacated, so that people have to study the factors that affect the take-off effect. In the past that the impact of back-type high jump take-off effect of the factors for pedaling stretch strength, stretching distance, take-off angle, take-off time, and the swing action. In particular, swinging leg leg swing neglected, this article on the swinging leg swing and the direction of the leg to explore.