When I got tendonitis I was told to ice it, don't use the arm for anything strenuous for 8 weeks. I would be the one armed man for two weeks, then go do something like shingle the garage or chop wood, and get blamed for playing tennis or shooting my bow, when it came back. Finally, I did the 8 weeks thing and it went away. When I tore a muscle when exercising, they also said that there was nothing to do but wait. I waited for a half a year and even at the end of that, I cut my bow weight from over 80 to less than 40 pounds for a season.