VigorousFlexibility and relaxation.Yin goes beyond the average stretching routine. This quiet, meditative practice focuses on lengthening the muscles and releasing connective tissues (fascia). Gravity is your friend, as you reach your edge, holding a pose for several minutes. It complements yang or "active" yoga-it's a must for any athlete. Stress and injury restrict blood flow causing stiffness and pain. Yin Yoga can help blood circulate better. The focus of this practice is to stretch the large muscles groups that commonly hold stress, such as hips, lower back and shoulders.