The Viavito anti-burst gym ball can be used for a huge array of exercises that strengthen the core, upper and lower body muscle groups while also toning. It's great for sit-ups, back exercises, stretching, balance and resistance work. You can even use it for free weights exercises as well. Made from tough anti-burst PVC and with a max load of 200kg (31 stone), this versatile gym ball is ideal for users of all shapes and sizes. Featuring a ribbed pattern for additional grip, this gym ball is suitable for use on just about any surface and comes with a hand pump included for hassle free set up.