How to do it
Initiate the crunch by drawing your ribs downward.
- 1
Sit on the stability ball and walk your feet forward, rolling the ball under your lower back.
- 2
Cross your arms over your chest or place them behind your head.
- 3
Lean back, extending your spine over the ball.
- 4
Crunch your torso up, engaging your abs, then slowly return to the starting position.
Expert tip
Ensure the ball is properly inflated to maintain balance and support during the exercise.
Common mistakes
- ✕Yanking the neck with hands behind head
- ✕Bouncing off the ball at the bottom
- ✕Feet sliding out from under the body