My daughter was complaining that her elbow used to hurt after hard throws. I told her all the time to snap her wrist but she didn’t understand what I was talking about. She used to snap her wrist at the bottom of the throw. Once she got the Wrist Snapper and used it she understood. First time playing catch after she used the wrist snapper she broke my thumb throwing me the ball. Now her elbow doesn’t hurt anymore and she throws rockets now.