Reverse crunches

Muscles worked

You need

How to do it

1. Lie on your back with your arms along your sides and raise your legs, knees bent at roughly 90 degrees.
2. Curl your knees in toward your chest, lifting your hips and lower back off the floor as your feet point up toward the ceiling.
3. Lower back down with control until your hips return to the floor, without letting your feet touch down between reps.
4. The lift comes from curling your pelvis up, not from swinging your legs - momentum is the enemy here.