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Old 01-31-2013, 03:10 AM   #4
Chas Tennis
Hall Of Fame
Join Date: Feb 2011
Location: Baltimore, MD
Posts: 4,123

In Elliott's book he discusses on the forehand that the shoulders should turn back farther than the hips so that some trunk muscles get pre-stretched for the swing (search: stretch-shortening cycle). He discusses the desirable angle range for the difference between the shoulders and hips - for an effective twist of the trunk.

Technique Development in Tennis Stroke Development(2009), B. Elliott, M. Reid & M. Crespo

I believe that this book is only available from the ITF Store.

Watch Djkovic to see a large angle between the hips & shoulders. Also, to see the use and timing of pre-stretch in the swing.

The term 'unit turn' for this overall motion may mislead some players into turning their shoulders and hips more the same amount, reduce stretch and lose pace.

Last edited by Chas Tennis; 01-31-2013 at 03:40 AM.
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