I had tendonitis for 2 years real bad, I too shoot a lot, all longbows plus I go to the gym 3 days a week! got so bad for a while that I couldn't grip my bow with my left hand, felt like someone sticking long needles in my elbow! here what I did, first I cut back on my shooting for a while, iced and heated my elbow for therapy, started on Glucosumine/Chondrotin combo daily 1000mgs (takes a while for it to build up in your system)you have to be persisitent on taking it! Ibuprofen/naprosen etc (anti-inflamatory) I have not had any issues w it in over a year now! I also used a tennis elbow band while it was healing up when ever I shot, now I do not use one at all! Tendonitis is a Trad bow shooters worst enemy I think, it very goes away on its own!