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Old 12-08-2012, 07:22 AM   #127
Join Date: Feb 2011
Posts: 6,273

pronation only closes the racket face if your forearm and racket are in line.

however since you grip that racket in an angle and on top of that lay the wrist back the pronation will swing the racket around the long axis of the forearm creating upward movement.

if you use a conti grip pronation can even contribute to the forward acceleration of the racket.
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