Your mind is processed by the peace and one-pointedness of mindfulness practice, and your body is processed by assuming certain postures. Eventually, the posture of sitting meditation practice becomes a soothing and natural exercise; it is natural relaxation. It is as if both mind and body were put into a washing machine and then into a dryer. But it is a dry-cleaning process rather than a wet-cleaning process. You do not have to go through the wetness of passion, just the dryness of prajna, or discrminating awareness. So shinjang, which is the Tibetan term for this kind of relaxation, is the Buddhist version of dry cleaning our whole being.
From The Profound Treasury of the Ocean of Dharma. Volume Two: The Bodhisattva Path of Wisdom and Compassion by Chögyam Trungpa, page 252