The Valeo burst-resistant 75-centimeter body ball helps improve your core strength, flexibility, balance, coordination, and muscle tone, making it an ideal addition to your exercise arsenal. Sitting on the body ball forces your body to stay balanced, thereby strengthening your stabilizing muscles and core. As a result, the exercise ball makes a terrific desk chair. As an alternative, you can design an extremely effective workout routine using the ball as a bench for dumbbell flies, shoulder presses, or ab crunches. Packaged with a workout DVD, a dual-action air pump, a wall chart with a step-by-step exercise program, plugs, and a measuring tape, the ball is a terrific choice for users of all exercise levels. The 75 cm body ball is designed for people who stand between 6' 1" and 6' 9". Valeo also makes 55 cm and 65 cm sizes.