Trainer and fitness guru Justin Bradshaw modeled SGT. H20's CombatSwim after the rigorous training he received as an Army diver. His challenging exercises encourage full-body fitness, using workouts that build stamina, boost metabolism, improve swimming skills, and promote weight loss. Incorporating the best of land-based cross-training systems, CombatSwim includes plenty of high-intensity interval training and pulse-hiking calisthenics. In the pool, water adds extra resistance that amplifies the effects of the exercises, which include swimming sprints, endurance swimming, and treading water with weights. Designed to sharpen the mind as well as the body, CombatSwim leaves exercisers with the same confidence and conditioning as some of the world's elite military warriors.