as far as the being old part of it. Im 15 and i had been shooting almost every day for a couple months and finally had to take a break. Realease arm elbow was KILLING me. Dont know what tendonitis feels like but i think i have a light case of it. I can shoot my bow alright now but to like lift something heavy with my arm straight out hurts like mad. i usually streach a little before i shoot my bow now. Its seemed to help, so has the ibuprofen