Posted by: Jack Mankin (MrBatspeed@aol.com) on Fri Jul 28 09:04:40 2006

>>> 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".<<<

Hi Andy

I was not aware that pulling off the ball is commonly interpreted as Rotational theory. That could be why Jima felt rotational mechanics caused his son’s problems. I agree with your interpretation. With good rotational mechanics, the head remains still. This means the shoulders are rotating evenly around a stationary point (the spine) like a “revolving door.” – Some may refer to this as “spinning.”

Jack Mankin