Yin Yoga is a profoundly relaxing and inwardly balancing practice taught in a heat-turned down room. It focusses on stretching the connective tissue of the body--fascia, tendons, and ligaments--whilst holding postures in stillness for a time.
Muscles are not engaged during the postures to enable the connective tissue to be affected as one breathes and surrenders into the postures. As such, the practice is a meditative experience. A feeling of relaxed euphoria is a normal by-product of the class.
The Yin practice stimulates pressure points in the body along the energy meridians as in acupuncture, and thereby helps release deep-rooted physical and energetic blockages. Yin Yoga is a fantastic compliment to more vigourous "yang" style practices such as Bikram Yoga.