Yin Yoga is a style of yoga that emphasizes staying in the poses for several minutes at a time.  The practice targets tension trapped in the deepest layers of the joints and tissues.  When done in a heated room (95º F), the muscles really get stretched to their limits.  Yin Yoga classes provide plenty of opportunities to explore stillness, as well as the intense physical and emotional sensations that get released when we stay in a posture for a long time.