Exercise Ball is one of the most popular home fitness equipment’s in the world. A primary benefit of exercising with a bodyball is that the body responds to the instability of the ball to remain balanced, engaging many more muscles. Exercise Ball can be used for stretching, strength training and balance training in more versatile ways than any other fitness equipment. Exercise Ball suits for all ages and fitness levels. The Gymstick Exercise Ball is made of durable non-slip material. Available in 55cm, 65cm and 75cm.