Yin Yoga is based on the Taoist concept of Yin and Yang, opposite and complementary principles in nature. Yin is the stable, unmoving, hidden aspects of things, for example in the body – relatively stiff connective tissues (tendons, ligaments). Yang is the changing, moving, revealing aspects which are more flexible such as more mobile and pliable muscles and blood.
These areas are especially rich in connective tissues.
Yin yoga is a slower-paced style of yoga with postures, or asanas, that are held for longer periods of time – for beginners, it may range from 45 seconds to two minutes, and more advanced practitioners may stay in one asana for five minutes or more.