for those of you with wrist stress due to bicep curls....its a compound lift, it involves more than just isolating the biceps.
the wrists are supinated by the forearm muscle (the one under the Joint that faces upwards when you are curling).
flex this muscle, and bring your wrists forward (upwards when looking down while curling) at an angle.
feel that forearm flex!!
now curl!
primary muscle- biceps
secodnary muscle/stabalizer- forearms
the majority of people iv talked to with wrist problems, really just have form problems, and try and relax their wrists while curling, which is retarded and puts too much stress on it