I have the same thing every time I try to do barbell curls. My forearms have splints that ache so much I can't hardly release the grip on the bar when I finish a set............So, I just quit doing strait barbell curls and went to the EZcurl bar. The angle of having my hands turned in some relieved alot of the pressure of my forearms. Also, I went to hammer curls on the dumbells for awhile, to alieve my forearms being twisted out. Within a couple of weeks, it went away, and I stay away from the barbell curls and I have no problem.