Sometimes a few hours after doing some heavy curling, my left arm will lock up suddenly when I bend it. A muscle or tendon stiffens up like a rock and it's very painful trying to extend my arm fully. I have to extend slowly and leave my arm straight so it doesn't lock up again. It usually just lasts the evening of the workout.
I've been training my biceps for years, but just this past year I've been occasionally having this issue.
Thoughts? Similar experiences?