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How do I perform correct crunches on a Smartball?

Remember to choose a Smartball that is appropriate to your height; when sitting on the ball, your knees and hips should be at 90 degrees or slightly higher.
Smartball Height Chart
| Your height |
SmartBall size |
Over 180cm (Over 6ft) 170cm - 180cm (5ft.6 - 6ft 160cm - 170cm (5ft.2 - 5ft.6) Under 160cm (under 5ft.2) |
75cm 65cm 60cm 53-55cm |
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Set up
Lie on a Smartball with the back slightly extended, the shoulders higher than the hips and lower back pressed firmly against the ball. Bend knees to form 90 degree angle between upper and lower legs. Position the legs so knees are placed just wider than shoulders. Cross arms over chest.
Technique
Contract abdominals and pull rib cage toward the pelvis until the abdominals are fully contracted. Keep lower back pressed against the ball. Hold, continue to contract the abdominals and breathe out remaining air. Slowly lower trunk to original positions, maintaining abdominal tension. Repeat.
If you dont have a SmartBall and you wish to purchase one, just call Jude on 9344-3009 and we can arrange to have a Smartball delivered to your doorstep.
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