Stack 52 HIIT Interval Workout Game. Designed Military Fitness Expert. Video Instructions Included. Bodyweight Exercises, No Equipment Needed. Fun Motivating Training Program. GET RESULTS FAST: Scientific studies show that HIIT burns fat and improves fitness more effectively than traditional workouts. The HIIT Interval Workouts Game was by designed by scientist and military fitness expert Sergeant Volkin who received a medal for the exercise programs he designed for the Army. FITS YOUR LIFESTYLE: Use the game to quickly create a unique HIIT workout you can do anywhere at any time. Workouts typically last 4 - 20 minutes. The difficulty is progressive. You can start at any level and advance to elite strength and fitness. EASY TO GET STARTED: No equipment, no planning, no memberships. Scan the exercise cards with a smartphone for online videos of Sergeant Volkin demonstrating each exercise. Visit our website for detailed video and written instructions. ITS A FUN GAME: You can play by yourself or compete with your friends, spouse, or children! Use the strategy cards to earn extra points, give your opponent extra exercises, or block your opponents strategy cards! No boredom; you will never play the same game or get the same workout twice. 100% MONEYBACK GUARANTEE: If you dont LOVE this game, you get your money back.