Gym Balls
Gym Balls
Gym balls are a great way to keep you active, to get fit and to keep your spine and muscles strong.
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.
Gymnic Gym Ball 