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Old 03-01-2013, 04:58 AM   #15
Chas Tennis
Hall Of Fame
Join Date: Feb 2011
Location: Baltimore, MD
Posts: 4,118

Some related information in Health & Fitness forum, be certain to view the Ellenbecker video -

Get some high speed videos of your serve and compare your internal shoulder rotation to those of pro servers.

240 fps shutter speed probably 1/10,000 sec.

Last edited by Chas Tennis; 03-01-2013 at 05:00 AM.
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