Reverse Crunches

Lay on your back with your knees together and your legs bent to 90 degrees, feet firm on the floor

Place your palms face down on the floor for support.

Tighten your abs to lift your hips off the floor as you crunch your knees inward to your chest

Hold for a second at the top for the movement, then lower back down without allowing your lower back to arch and lose contact with the floor