Start sitting on the edge of your yoga mat. Lean your chest back while engaging your abs. Lift your feet off the floor with bent knees, shins parallel to the floor. Lengthen through your lower spine, and bring your hands toward the center of your chest.
Twist your torso to the right, then back to the center, then to the left and back to the center. Repeat and keep the movement slow and controlled, with a straight spine.