Anybody have this? About 2 days ago I played for 3 1/2 hours straight , we covered some rancid, iggy and the stooges and some classics too, I was using a pretty heavy bass, about 10.5 pounds, and about 2 hours after the show I felt it in my biceps and shoulder, I get it in my shoulder from the weight, and it usually goes away by the next day, which it did, but this soreness in my biceps and stretched out feeling is still there, anybody have a quick remedy or at least know what the problem is? Im self taught, so is it a technique issue? Or this just normal? By the way, Im 16, 6ft 2 ish and I weigh about 140 lbs, so I dont have much muscle mass.