Exercise Ball Crunch

This exercise can take a bit of adjusting to get your position just right. Keep putting the exercise ball in different positions on your back until it feels good. You'll know it's right because the exercises will burn a lot more.

1. Lie back on the exercise ball and place your hands to your ears
2. Squeeze your ab muscles and crunch up, making sure you use good crunch technique
3. Hold for 1 second
4. Lower back down again
5. Repeat x20