Lie flat on the floor and pull your abs down to target your deep abs. Interlace your fingers, and put your hands behind your head. Bring your knees to a tabletop position and lift your shoulder blades off the floor.
Straighten your right leg out to about a 45-degree angle to the ground while twisting your upper body to the left, bringing your right elbow toward the left knee.
Repeat on the other side, and continue back and forth in a pedaling motion.