It seems that whenever I do hammer curls I get really bad spasms in my forearms later that night. They happen anytime I bend my elbow, and go away when i keep my arms more or less straight.
The spasms are in both forearms in the same spot, right on top where the forearm meets the elbow. the muscle that flexes when you raise your wrist up towards the ceiling.
is this due to some sort of deficiency?