How to do it
Plant your feet shoulder-width apart and press them into the floor.
- 1
Sit on a stability ball and walk your feet forward, rolling the ball under your lower back.
- 2
Hold a weight with both hands above your head.
- 3
Perform a crunch, lifting your shoulder blades off the ball.
- 4
Lower back down with control and repeat for the desired number of repetitions.
Expert tip
Ensure that you're not pulling on your neck with your hands; the lift should come from your core.
Common mistakes
- ✕Holding the weight behind the head
- ✕Rolling too far forward onto the neck
- ✕Dropping the hips during the crunch upward