肌肉的收缩和放松,是在神经系统的支配下交替进行的,即一块肌肉收缩之后紧接着便是放松,作用于同一关节机能相反的两种肌肉,若主动肌收缩,则对抗肌放松。当对抗肌转化为主动肌收缩时,则主动肌转化为对抗肌放松,肌肉就是这样交替配合完成一定运动的。实践证明,放松训练是通向冠军的必经之路,而且对任何运动员都有显著的成效。一、肌肉放松对短跑的作用(一)肌肉放松能够增大肌肉的收缩力量研究表明,肌肉收缩前的初长度与肌肉放松 Muscle contraction and relaxation, is under the control of the nervous system alternating, that is, a muscle contraction is followed by relaxation, acting on the same joint function of the opposite of the two muscles, if the active muscle contraction, the anti-muscle relaxation. When the antagonist into active muscle contraction, then the active muscle into antagonistic muscle relaxation, muscle is such an alternating with the completion of a certain movement. Practice has proved that relaxation training is the only way to the championship, but also for any athletes have significant results. First, the role of muscle relaxation on the sprint (A) muscle relaxation can increase muscle contraction force Studies have shown that the initial length of muscle contraction and muscle relaxation