Crunch (on stability ball)

How to do it

1. 1Sit on the stability ball with your feet flat on the ground and your knees bent at a 90-degree angle.
2. 2Lie back on the ball until your lower back is supported and your upper body is parallel to the floor.
3. 3Place your hands behind your head or across your chest.
4. 4Engage your abs and lift your upper body towards your knees, curling your torso forward.
5. 5Pause for a moment at the top of the movement, then slowly lower your upper body back down to the starting position.
6. 6Repeat for the desired number of repetitions.