As youth hockey players careen toward the boards, it is almost instinctive for them to duck their heads. But that is exactly the wrong thing to do. Experts say that this fast, powerful and physical sport can be safer if players follow some simple advice. USA Hockey, the national governing body for the sport, worked with Mayo Clinic to release a video with animation demonstrating the dangers of players ducking their heads as they crash into the boards during play. A training program called "Heads Up, Don't Duck" teaches players to automatically choose the safest posture for impact.