How to do it
Plant your feet shoulder-width apart and press them evenly into the floor.
- 1
Sit on a stability ball and walk your feet forward, rolling the ball under your lower back.
- 2
Place your hands behind your head or across your chest.
- 3
Perform a crunch by curling your torso up and forward.
- 4
Lower back down, keeping tension in your abs.
- 5
Repeat for the desired number of repetitions.
Expert tip
Focus on maintaining a curve in your lower back to match the shape of the stability ball for better ab engagement.
Common mistakes
- ✕Letting the hips drop below the ball line
- ✕Pulling the head forward with the hands
- ✕Rolling back until the head touches the floor