The Iso-Bow is Your Dumbbell to building powerful muscles, today the trainee will have no excuse not to get into the best shape of their life--with a handful of exercise phases all in the convenience of your own bedroom.Transformation expert Marlon Birch, CSCS, whom Bullworker dubs the strongest and fittest man to build his body without the use of weights and machines. Has created an effective, body-transformation master-plan based on the most effective strength producing exercise plan in the world. You will be amazed with these scientifically devised programs how it builds a powerful, symmetrical, and a well proportional physique.Using Isotonic strength building exercises and the power of Isometrics, you will transform your body, increase your strength and get leaner in record-breaking time. Develop ripped abs, a powerful chest, powerful legs, a strong neck and lower back muscles in as little as 30 minutes without stressing the joints and tendons.