As a Pilates instructor I found the following article of interest.
I know from my own clients who suffer from shoulder pain most if not all benefit from regular Pilates classes.
Pilates-based or Dance Therapy
The Dance medicine program at the Center for Sports Medicine is not just for dancers! Pilates has proven beneficial for persons with shoulder pain as a method to avoid surgery, prepare for surgery or rehabilitate after surgery. Pilates rehabilitation and conditioning programs, using apparatus based on the designs and philosophies of Joseph Pilates, improve one's flexibility and balance, increase joint support through core strength and provide for freer, pain-free movement.