Posted by: Andy (Devilsbaseball19@yahoo.com) on Thu Jul 27 19:28:37 2006

>>> I've posted on this site many times that I've experienced similar experiences with my 13 yr old son. After 3 yrs of rotational instruction his left shoulder was opening up too soon; the hands were going in circular motion, but the bat wasn't in the strike long enough to make consistent contact. He crushed inside pitches...foul. Outside pitches, changes and curves were death. <<<
>

The front shoulder opening up is a timing issue, not a mechanical one.

It would be a mechanical issue if the axis of rotation (near the spine) was pulling away from home plate. This action of pulling off the ball is commonly interpereted as Rotational theory. Actual theory is to keep axis of rotation stable. If someone tells you that the front shoulder is coming out, it usually meant that the spine is moving away from home plate during the swing. If the spine remains stable, people assume the shoulder remains "closed".