View Single Post
Old 12-23-2013, 09:45 AM   #28
Chas Tennis
Hall Of Fame
Join Date: Feb 2011
Location: Baltimore, MD
Posts: 4,119

Originally Posted by julian View Post
Let me describe the sequence:
A racket reaches a lowest point.
Arms/arm maybe straight here.
A racket goes up
A racket contacts a ball
Arms/arm maybe straight here
Ball contact or impact lasts about 3-5 milliseconds.

A stretch shortening cycle for a joint motion may be much longer, a slower stretching phase followed by an accelerating phase, tenths of a second? Usually for impact those particular SSCs have reached a high velocity. (ISR for the serve.) If you mean the SSC or those SSCs that continue to impact, try to identify, by muscles or joint.

For example only (not for any stroke),
Leading to impact, a SSC cycle of trunk muscles is used to rotate the upper body and a SSC of a shoulder muscle is used to accelerate the arm, etc.

Last edited by Chas Tennis; 12-23-2013 at 10:00 AM.
Chas Tennis is offline   Reply With Quote