For an athlete to improve their speed and quickness, they must employ the technique of contrast training. This simply involves performing basic movements while quickly switching back and forth between resistance and assistance. Alpha Dog Sports specifically designed the Viper to accomplish this training need. Whether its sprinting, leaping, or change of direction, the Viper will condition an athlete to perform flawlessly under any conditions.This DVD is approximately 32 minutes long and was shot using multiple moving, digital cameras, and professional level athletes. Quickly access any of the 25 drills through chapter selection. We guarantee you won’t find a better Viper training video in the world!