Yin yoga is a slow-paced style in which poses are held for five minutes or longer. Even though it is passive, yin yoga can be quite challenging due to the long holds, particularly if your body is not used to it. The purpose is to apply moderate stress to the connective tissue - the tendons, fascia and ligaments - with the aim of increasing circulation in the joints and improving flexibility.
It was founded and first taught in the U.S. in the late 1970s by martial arts expert and Taoist yoga teacher Paulie Zink. Yin-style is now begin taught across North America and in Europe, due in large part to two of the more prominent instructors, Paul Grilley and Sarah Powers.