i have been doing barbell curls and preacher curls and whatnot for over 5 years, just recently ive been having this problem which has pretty much stopped my bicep workouts. when i take the weight up im fine, and when i lower it im fine, but as soon as i release my grip on the bar or whatever im using, i get this strong aching pain in my left forearm/bone, about two inches above the wrist. bad enough now to where i havent worked biceps for about a week. also, it only hurts when i do curls with my palms facing upwards, if i have my palms face down i can do curls fine. can somebody please give me some advice on what to do??btw im 20 in case that matters.....