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辅助投掷臂的作用主要表现在两个“动”字上:摆动和制动,下面就从这两个“动”字上做简单的分析。一、辅助非投掷臂摆动的作用(一)可以提高身体转动的速度在预备姿势时,整个左侧的动作形成良好的超越器械具有非常重要的作用。左臂自然下垂和左肩内扣,使上体在当右腿积极蹬伸、髋部左转并前移的同时开始抬起,左臂和左肩的内扣使腰部肌肉成扭紧状态,整个过程为拧腰转体,此时,左臂为瞬间爆发积蓄的动能,然后通过向左上方积极摆动,加大了转体半径,转体幅度的加大最终使转体速度获得了提高。(二)可以获得推球时的最佳速度左臂的摆动加大了右脚的蹬地力量,加速了上体的转动,充分伸展胸部和肩部肌肉,以便于加大最后用力时的出手力量。如
Auxiliary throwing arm role mainly in the two “move ” words: swing and brake, the following from the two “move ” word to do a simple analysis. First, the role of auxiliary non-throwing arm swing (A) can increase the speed of body rotation In the preparatory position, the entire left side of the movement to form a good surpassing instrument has a very important role. The left arm naturally drooping and the left shoulder buckle, so that when the upper body active Dengzhe right leg, left turn and move forward at the same time began to lift the left arm and left shoulder buckle to the waist muscles into a tightening state, the entire process In order to twist the waist, the left arm is an instantaneous accumulation of accumulated kinetic energy, and then swivels to the upper left to increase the radius of the swivel body. The increase of the swivel width finally increases the swirl speed. (B) you can get the best speed when pushing the ball The swing of the left arm increased the power of the right foot pedal to accelerate the upper body rotation, fully stretch the chest and shoulder muscles in order to increase the last force shot power. Such as