Reverse Crunches

How to do it

1. Lie on your back with your knees bent over your hips and your arms resting at your sides.
2. Brace your abs and keep your knees bent.
3. Curl your hips off the floor, drawing your knees toward your chest.
4. Pause at the top and squeeze your lower abs.
5. Lower your hips slowly until your back returns to the floor.