Lie on the floor with your legs bent, feet flat on the floor and hands clasped loosely behind your head with the elbows touching the ground.
Tilt your head as if you're holding an apple between your chest and your chin.
Imagine that there is a piece of Velcro on the floor beneath your lower back holding it down. You may feel like you're doing a small pelvic thrust to accomplish this. Keep your lower back nice and stable in this position.
Curl your upper body forward and up off the ground (don't pull on your neck as you come up), holding the highest position for a full second before lowering your upper body.
When you lower your upper torso back toward the ground, don't return all the way to the ''relaxed'' position where your weight is supported by the ground, but rather to a point where your upper body is just above the ground and the abs are still contracted.
Remember to keep your elbows visit this site all the way back while doing the motion.