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起跳是体育项目中普遍动作之一,而原地纵跳是各种其他起跳的基础。人体起跳又是在神经系统指挥下主要由肢体协调配合,依靠肌肉收缩曳引骨杠杆,通过足对地面的作用,从而地面给人体以反作用外力,以实现人体跳起一定高度的效应。研究肌肉活动以及人体受力的时空关系对正确理解基本动作的内、外因素关系,以及对教学与训练有着理论和实际的意义。
Take-off is one of the most common actions in sports, while in-place vertical jumping is the basis for a variety of other take-offs. Human body is also under the command of the nervous system under the command of the coordination of the body mainly by relying on muscle contraction drag the bone lever, through the foot on the ground, so that the ground to the human body to counteract the external forces in order to achieve a certain degree of human bouncing effect. Studying the spatio-temporal relationship between muscle activity and body stress has a theoretical and practical significance for correctly understanding the relationship between internal and external factors of basic motions and for teaching and training.