Serve - Use of the Opposite Arm
The non-racquet arm helps the torso accelerate then abruptly stop, producing a powerful whipping action in the racquet arm.
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The resource you have requested is available only to current members.The non-racquet arm helps the torso accelerate then abruptly stop, producing a powerful whipping action in the racquet arm.
* A web version of this article is also av ... (to access this download, please log in below.)