My dd is going to PT for that right now. I'll see if I can scan the exercises she does. It's not specifically to prevent gymnast wrist but strengthening the wrist and arm in general.
I have no experience with it yet but we will be starting with Laurel Springs School in the next month or so. Seems like a good choice both accredited and NCAA compliant.
I think the kids do all these cartwheels and stuff while walking because they don't know how to walk. Mine can tumble up and down the floor but can't take 10 steps without tripping on herself or something else.