I'd like to offer my little bit of experience with tendonitis if I could. Last year I developed very bad tennis elbow (even tho I don't play tennis) and my doctor gave me small exersises with soup cans. For the weight. About that time I started going to a gym and doing weight exersising. In less that two weeks I started feeling better, and in two months the pain was totally gone and now I'm good as new...well, not new..as good as I was before the tendonitis ;-)Hope this helps.
Love, annap