Rocker Hurdles are made for high school use. They are built to "rock" when hit so younger hurdlers are not thrown off balance and easily injured. Championship Hurdles are for college level programs. They are heavier and have bases made with square tubing welded at the corners. These "L" shaped hurdles offer more resistance when hit, making it more difficult for the athlete to maintain balance. Training hurdles can double as plyometric training devices.