pivot

Results showed compared with palm-up volo technique,which is characterized by forward spin and low peak flying,plam-down volo technique is easy to produce quick backward spin high peak flying,therefore,increasing the ball s hitting ratio and residing ratio.

运用力学理论和方法对正、反手抛击技术动作进行了分析 ,结果发现 :与产生前旋、低平飞行的抛击球为主要特征的正手抛击技术相比 ,反手抛击技术易产生较大后旋速度的高吊抛击球 ,有利于增加击球的命中率和留球率。