For some reason unbeknownst to me, I've been getting a lot of calls for gigs lately, so the number of hours I spend behind a bass each week has increased by about 100 percent. This is a good thing in most respects, and I'm certainly not complaining. However, at my last gig, I began to notice some pain and stiffness in one of the muscles that runs along the top of my left arm, from about my wrist to my elbow. There was also definite pain and tenderness in my elbow. I got through the gig by shifting the angle of my bass occasionally, and by concentrating on NOT gripping the neck. But I was just a little shaken up--I've never had any problems of this sort before, probably due to my light playing load. I want to be in this thing for the long run and don't want to be sidelined. Anyone have any experience with this kind of pain? Any suggestions for preventative techniques? Thanks.