By using the Rotater for only a few minutes a day, stretching my shoulder both internally and externally, I have been able to see a measurable difference in the range of motion in my shoulder. This has transferred over to a wider, more efficient and more powerful turn in my golf swing.
Your Rotater has been the best rehabilitation for my shoulder. the old football injuries that gave me a stiffness has been relieved and my shoulder rotation for long driving the golf ball has been great. Not many 61 year old guys can get it out over 320 yds which I did last week at a charity event fundraiser for Lukemia.
Once you get the idea, the device is very effective at stretching internal and external rotation passively, so that patients can replicate the manual stretching performed by their physical therapist in the clinic.