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Old 12-18-2012, 04:07 PM   #56
toly
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Join Date: Sep 2010
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Quote:
Originally Posted by JackB1 View Post
ad side serves
http://www.youtube.com/watch?v=MIGX4touWHc

deuce side
http://www.youtube.com/watch?v=vTjmVNQzqpI

I can see how I a falling to the left instead of straight into the court.
that one thing I am working on.

I know my from isn't the greatest, but I can usually hold serve about 75% of the time and only double fault about 2, 3 times a match. Any suggestions on what I can improve would be great. Thanks.
Definition: The Target Plane is the plane that includes the tennis ball at contact and the imaginary target inside of the deuce or ad tennis court. This plane should be parallel to the perpendicular to the racquet string bed during the impact. The Target Plane basically determines the boll velocity direction. We shouldnít change amount of the arm pronation, because it is almost impossible to control, in order to change bollís direction. Itís much easier to alter direction of the Target Plane. Always keep the range of the arm pronation around 90į.

Letís analyze Stosur and your arm actions before contact.



In pic.1 Stosur longitude axis of the racquet is parallel to Target Plane. In pic.3 longitude axis is perpendicular to the Target plane. She rotates her racquet by using internal shoulder rotation (ISR) around 90į.

In pic.4 longitude axis of your racquet is already perpendicular to Target Plane. Thus you cannot use, before contact, internal shoulder rotation at all. Thatís why you apply ISR after contact, but that doesnít make any sense. With this technique you never are going to get powerful and consistent serve.
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