Breath regulation is the link between body regulation and mind regulation.
The breath originates in the dan tien, the center of the body. While engaging body regulation by relaxing and aligning, engage breath regulation by allowing the breath to expand and contract naturally from this point, in particular the belly, inhaling and exhaling spontaneously and completely. If you are relaxed enough you will feel the wave of expansion and contraction rippling through your body, out to the ends of your extremities. Let this subtle wave precede and guide your movements; in practice, let your movements be initiated and directed by the breath.