According to Bernie Clark, one of the founders of Yin Yoga, the practice targets the connective tissues, such as the ligaments, bones, and even the joints of the body that normally are not exercised very much in a more active style of asana practice.
Suitable for almost all levels of students, Yin Yoga is a perfect complement to the dynamic and muscular (yang) styles of yoga that emphasize internal heat, and the lengthening and contracting of our muscles. Yin Yoga generally targets the connective tissues of the hips, pelvis, and lower spine.