-Lie on your back with your palms flat on the ground, and legs bent so that your feet are on the ground.

-The more bent your legs are, the easier the exercise will be.

-Keeping your shoulders, butt, and hands on the ground, raise your legs toward your stomach, tightening your core.

-Once you reach the top portion of the movement, raise your legs vertically, and your butt should come off the ground slightly.

-Lower your legs back down, and then return them to the starting position.

-You should feel this movement in your stomach.