[BerntR]

Im primarily talking about the butt pushing in towards the Base Line in Transition when viewed from a DTL perspective.

TPI has isolated this thrusting as a major point of departure between pros and amateurs. Pros by and large dont do it. Amateurs do.

Then I'm not sure I agree with TPI. Look here: http://www.the-efficient-golfer.com/...oods-yips.html. Trevino seems to keep his spine pretty well but the others crum their back and some of them do it big time.

However, I did take a serious two week full time trainer course about a million years ago. So I know what this is about. The guy that taught us about muscles and power said that: A weight lifter that ... /does this move/... will be able to lift a heavier weight, but it may/will damage his back. He also said that a lot of the world class lifters did this.

You're looking for a healthy lift here, with a straight back. It will shorten your ball striking unless you have a very specific fitness regime to make up for the disadvantage. But it may give you more years. Personally I don't think golf is as hazardious to the spine as weight lifting.