Take position with your back flat on the ground and hands positioned behind your head. Do not interlock the fingers. Elevate your legs to almost a 45 degree angle to the ground and keep a slight bend at the knee. This is the starting position.
Commence the movement by contracting your abdominals and breathing out as you elevate your torso off the floor and bring your right elbow across toward the left side of the body. Remember to squeeze the abs to lift you, not just twist the elbow forward.
At the point of maximum range of motion, squeeze the abs hard before slowly lowering the body back to the starting position, inhaling as you do. Perform the same movement on the opposite side and then continue to alternate.