I’ve been having Physical Therapy for my rotator cuff tendonitis. Here’s a site that shows the type of exercises that the PT gave me:
Using resistance bands (thera bands)…
http://www.orthoassociates.com/shoulder1.htm
Here they are using dumbells (be sure to start with very low weight, like 1 pound)…
http://familydoctor.org/265.xml
If these exercises hurt, back off on the weight or the repititions. Ice the shoulder(s) for 20 minutes after doing them.
Also, here’s a stretch the PT gave me (the first one, with both arms clasped behind your back…I haven’t tried the broomstick one!)…
http://www.thestretchinghandbook.com/archives/rotator-cuff-injury.htm