Exercise ball standard exercises, such as a push-up, on an unstable surface can be used to increase activation of core trunk stabilizers and in turn provide increased trunk strength and greater resistance to injury. Fitness Experts and some doctors also recommend sitting on an exercise ball instead of an office chair. That is based on the theory that the abdominal and back muscles are constantly engaged and active to maintain proper posture and balance on the ball. There is no scientific evidence of those benefits occurring by just sitting without additional exercises. However, some people warn against using a Swiss ball as
Bandy ball Bandy ball A bandy ball is a rubber ball used for playing bandy. The core of the ball is made of cork and this is surrounded by rubber or rubber-like plastic. The ball should be manufactured in a diameter of 62.4 mm or 63.8 mm (the latter is called "Russian ball") and the colour was originally red, later orange or cerise. According to the Bandy Playing Rules set up by the Federation of International Bandy, any of these is allowed, but all balls used in one game must be of the same colour and type. Bandy balls are manufactured by