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一、影响初中体育100米跑成绩的因素分析(一)100米跑决胜因素。100米跑这个项目完成的过程可以分为以下三个部分,分别是前期的加速度、中期的最高速度以及后期的耐力速度三个部分。这三个部分之间有着密切的关系,前期加速度的大小决定了中期最高速度的快慢,中期最高速度越高,100米跑的成绩也就越好。中期最高速度有一定的瞬时性,根据运动生理学的相关知识可知,运动员在加速跑的时候,肌肉组群克服阻力做功,肌肉不断地收缩和扩张,肌肉收缩
First, the impact of junior high school sports 100-meter run factor analysis (A) 100-meter run-off factor. 100 meters run The completion of this project can be divided into the following three parts, namely the early acceleration, the highest speed in the medium and the endurance speed of three parts. There is a close relationship between these three parts. The size of the early acceleration determines the speed of the highest speed in the medium term. The higher the highest speed in the medium term, the better the performance in 100-meter running. The mid-term maximum speed has a certain instantaneous, according to the relevant knowledge of exercise physiology shows that when the athletes in the accelerated run, muscle groups to overcome the resistance to do work, muscles continue to shrink and expand, muscle contraction