One Effect of Rein Pressure October 28, 2019 0 1470 Share FacebookTwitterPinterestWhatsAppEmail Michael Poulin demonstrates how inside rein pressure affects the balance of a young horse. Filmed at the 1996 USDF National Symposium. To watch more, visit the USDF Online Store or the USDF Digital Video Library for Lower Levels with Olympians. Share this:TwitterFacebookEmailLike this:Like Loading...