1.前言小学、初中阶段他们的成绩都进步较快,在高中阶段业余训练中常常发现较多的队员成绩提高到一定程度后就停滞不前了,按常规高中阶段应该是进步较快的时候,随着力量自然增长和机体机能的自然发育完善也应该有所进步,可是他们因训练时间长了固定了动作体系,在速度频率节奏、动作幅度用力状况都较固定时, 1. Introduction Elementary school, junior high school stage their scores are progressing rapidly, in the high school amateur training often find more players to a certain extent after the stagnation, according to conventional high school should be faster time , With the natural growth of power and the improvement of the natural development of the body function should also be improved, but because of their long training time fixed movement system, the speed and frequency of rhythm, the force of action range are more fixed,