Crunch (Stability Ball)

How to do it

1. Sit on a stability ball and walk your feet forward until your lower back and hips rest on the curve of the ball.
2. Plant your feet flat on the floor at hip width and rest your fingertips lightly behind your head.
3. Brace the core and curl your torso upward, keeping the ball stable beneath your lower back throughout the range.
4. Extend back over the curve of the ball at the bottom to lengthen the range before curling again.
5. Exhale as you curl up and inhale as you lower back over the ball.
6. A common fault is letting the ball roll or the hips sag, keep the feet and hips locked in place throughout.

Muscles worked

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