This video says she was player of the year at Div I school but was not fully pronating correctly. Is that possible? Div I is a high level. We're gonna prove to you today that you should pronate on all your serves. There's a myth about no pronation some people think it's just rotation of the arm. We have a player for Division one school Winthrop University. She was a very good player, player of the year several times but she struggled to serve a little bit. Today we're going to completely convert her serve and add about twenty miles an hour.