[Physioguy]

Ultimately, the changes will be better for your shoulder (and possibly other areas), and may even help your golf game. Short term, there may be a period of struggle, as is the case with almost ANY change made to the swing.

If you truly have a tendinosis, follow the PT advise. You need that thing to settle down.

A rounded forward shoulder posture is definitely not great for the shoulders, and predisposes a person to a condition known as "impingment" in which the rotator cuff tendons may be compressed against the "roof" of the shoulder.

Once the shoulder is up to it, you will want to do some golf-specific shoulder and rotator cuff strengthening exercises. There is a lot involved in slowing down that club after impact!

If you really want to be thorough, you might also want the PT to check to see if something down the chain (i.e. below the shoulder girdles) is causing excessive stress on the shoulders.