How to do it
Keep your elbows back and your chin off your chest.
- 1
Lie on your back with your hands behind your head and legs extended.
- 2
Perform a traditional crunch by lifting your upper body off the floor.
- 3
As you crunch up, split your legs apart and then bring them back together.
- 4
Lower your upper body and legs back to the starting position.
- 5
Repeat for the desired number of repetitions.
Expert tip
Ensure that you are engaging your core throughout the exercise and not relying on the momentum of your legs.
Common mistakes
- ✕Pulling on the neck with the hands
- ✕Arching the lower back during the crunch
- ✕Swinging the legs apart without control