什么叫弹性动作?身体活动如像橡皮筋或弹簧一样的动作,叫弹性动作。就网球运动的挥拍动作来说,不是用手腕来挥动,而是一次被拉长或压缩的弹簧(肌肉)一样,要回到原形的气势来挥拍。 What is a flexible action? Physical activity like a rubber band or spring-like action, called elastic action. As far as the swing action of tennis is concerned, instead of swinging with a wrist, it is a spring (muscle) that is elongated or compressed. It is necessary to return to the momentum of the original shape to swing.