How to do it
Press your calves lightly into the ball and hold the top for one count.
- 1
Lie on your back with your calves resting on a stability ball.
- 2
Place your hands behind your head or across your chest.
- 3
Perform a crunch by lifting your shoulder blades off the floor.
- 4
Lower back down with control.
- 5
Repeat for the desired number of repetitions.
Expert tip
Keep the ball stable by engaging your core and glutes throughout the movement.
Common mistakes
- ✕Pulling on the head with the hands
- ✕Allowing the hips to sag toward the floor
- ✕Raising only the head off the floor