Get ready to go airborne. Offering more than 30 explosive jumping moves, this intense cardio routine will keep you in the air most of the time. Plyometrics, also known as jump training, has been proven to dramatically improve athletic performance. If your sport involves a ring, rink, field, court or track, this training will give you the edge. Just be prepared to "bring it" for a full hour when you leap in to this workout because there is no letting up.