Something that resists the athlete’s efforts to accelerate and run faster is an exercise technology that has never existed before. The science is represented by the “TANK Power Curve,” that can be split into three workout zones. The lower zone is for speed power through stride length and endurance. The middle zone is to build acceleration power by increasing launching power and stride frequency. The top zone challenges the lower body like no other piece of equipment, providing explosive power and quickness for any breed of athlete. A TANK workout is easy to get into, feels great, and takes less time than existing aerobic and strength exercise.