在体育教学或训练中我们经常会发现:有些学生跑起来很吃力,全身肌肉始终处于紧张状态,但成绩反而不好。为什么会出现这种现象呢?主要是没有自然放松,因为短跑的自然放松能力是影响短跑成绩的一个重要因素。 短跑是一项高强度的运动,学生在进行练习与比赛时无论在生理或心理方面都承受着较大的刺激和负 In PE teaching or training, we often find out that some students run very hard and their whole body muscles are always in a state of tension, but their scores are not good. Why does this happen? The main reason is that there is no natural relaxation. The natural relaxation ability of a sprint is an important factor that affects the sprint performance. Dash is a high-intensity exercise, students in the practice and competition regardless of the physical or psychological aspects are subject to greater stimulation and negative