flexible wrist action meaning in English

灵活的腕部动作

The rules of badminton are similar to those for tennis , but the method of player playing is quite different . badminton requires flexible wrist actions . the racket can be held with a " shake hand " grip , but needs to be adjusted constantly in response to different ball movements
羽毛球的规则大致跟网球一样,但是打法和网球不同.羽球注重腕部的灵活运动,握拍方式虽然也有[菜刀式]握法,好适应多变化的球路