A. Make full contact w/ the ball. Right before making full contact w/ the ball, the left rotator cuff should have range of motion.
B. Swing all the way through the ball, your uper body should be used to have more power in the serve by slightly leaning foward. When using your upper body there will be minimal torsion within the logitudinal axis of the transverse plane.
C. Left arm should end up on the left side of your body. There may be some acute loading to your shoulder and rotator cuff if this is not done properly the serve.
Novice
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