Sit on the ground with your knees bent and your heels about two feet from your butt; lean slightly back without rounding your spine.
Place your hands behind your head, keeping your elbows wide.
Pull your navel to your spine, and as you exhale, twist slowly to the right. The movement should come from the ribs rotating. Inhale through center, and rotate to the left. This completes one rep.
Advance this move by lifting your heels off the mat.
Continue twisting from side to side as many times as you can in one minute, keeping good form.