Multipurpose Workout Ball Combines elements of cardio strength and flexibility into unique and highly effective workouts Forces you to maintain your center of gravity while performing any exercise Muscle Engagement 22inch 56 cm balance ball increases the difficulty of workouts and builds your strength faster by forcing the engagement of more muscles Versatile Balance Dome Balance trainer improves your flexibility endurance strength and overall ability by allowing you to perform multiple and versatile workouts Good for Rehabilitation Not just for exercise this workout ball can be used as equipment for rehabilitation and physical therapy with the help of its unstable surfacing Durable Easy to Use Includes a guided workout and easytouse inflation pump Made with strong nonslip nonmarking durable material and can support up to 250 pounds