I'm talking fastball here, normally wrist action is a no-teach for me. Lately I have taken on several students who came with a history of warming up with wrist snaps and using HE mechanics. Some had a few lessons and some were 'monkey see, monkey do'. After weaning them off snaps and teaching them basic IR arm action I'm noticing a certain lack of dynamic action at release and I'm wondering if they are locking the wrist as a reaction to my 'no wrist snaps" edict. Which leads me to the question; what does the wrist do in the IR pitching motion? How does it compare to what the wrist does in the overhand throwing motion, a question especially for those of you who have some fastpitch pitching experience. I'm asking this with the fastball in mind, I know that for other pitches there are different wrist positions so I want to leave them out of this.