I am currently dealing with the golfer's
elbow on the right side, but a while back
I had pain in my left bicep similar to
the pain you describe.
When I did pullups with palm facing me
I felt no symptoms. When I did wide
grip pullups with palms facing away
my left arm went weak with the bicep
pain. Over time I gradually worked it
out with 3 sets daily of 5 slow & easy
wide-grip palms away reps. I think
it was exposing some imbalance in the
muscles of my upper arm. I actually
forgot about those symptoms since
I've been pain free for about a year.
If only I could get rid of this golfer's