On the MoveGym Balls
Gym Balls for Back Pain
Gym balls are a great way to keep you active, to get fit and to keep your spine and muscles strong. Gym Balls are used in sports, recreation, in classrooms and offices. By using a Gym Ball as a seat you create instability, which triggers core muscles to become active - it gives you a mini work out while you sit.
Sitness Ball Chair
The Sitness Ball Chair achieves what a Gym Ball does, plus it stimulates better posture, without the risk of falling off or chasing the ball around the room as it rolls away.
Choosing the right size of ball
While sitting on the ball, the knees should be lower than the pelvis; i.e. the angle between thighs and the upper body should be greater than 90 degrees. For approximate sizes, see table and sketch below.