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Old 03-31-2013, 05:41 PM   #12
Chas Tennis
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Join Date: Feb 2011
Location: Baltimore, MD
Posts: 4,119
Default Raonic Wrist before and After Impact

Here is a video showing Raonic's wrist before and after impact. I would not call that a 'snap' or much wrist motion/bending at all. Serve type & whether a fault are unknown.


The best stop action single frame on Vimeo can be done by pressing the play-pause button as fast as possible. The arm passes by around second 7. (It took me 10+ tries to catch impact.)

From behind, high speed videos show that the angle between the forearm and racket (β=20-30 at impact) changes extremely rapidly as the arm rotates so that the forearm and racket become much more in a straight line (β~0) roughly a hundredth(?) of a second after impact. See other serve videos taken from behind.

Last edited by Chas Tennis; 03-31-2013 at 06:27 PM.
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