I've been getting some pain in my left arm / bicep area while squatting. It's not a sudden sharp pain but but one that grows as the sets go on and it's distracting nonetheless, messing with my workout a bit. Any ideas what that might be and what I could do to help it? Flexibility issue? I've been trying some stretches which make it feel slightly better (but only temporarily) Then it comes back when I do the squat again. I tried moving my grip out further on the bar which helps but only slightly. It actually feels better after I do some bench pressing. The right arm feels fine.