This exciting new workout system has been designed and used by Teddy Atlas, a professional trainer and well-known boxing legend. Teddy Atlas has trained more than seventeen world class professional fighters throughout his exceptional career. The Teddy Atlas Workout System incorporates all of the training secrets, techniques, drills and exercises used by Teddy and his fighters over the years. The Teddy Atlas Workout System is a set that includes a 100 lb. Hanging uppercut bag that has been specially marked so that it can be used in conjunction with an instructional training CD.