Step by step instructions
Lie faceup with your arms and legs extended. Separate your arms slightly wider than your shoulders and your legs wider than your hips. Crunch up, lifting your shoulders as you raise your legs 45 degrees off the floor.
Put your right hand behind your head and lift your right leg as you reach your left arm toward it. Return to starting position; repeat on the opposite side to complete 1 rep. (Keep shoulders and legs raised the entire time.)