Yin Yoga is an asana practice that allows stressing in a healthy way of the bone/ligament/tendon and fascia tissues.
The term ‘yin yoga’ comes from the Taoist tradition. Yang relates to more intense movement, creating heat and strength in the body while Yin is about finding stillness, softness and cooling in the body.

As Bernie Clark explains in his renown book ‘The Complete Guide to Yin Yoga’: Most forms of yoga today are dynamic, active practices designed to work only half of our body, the muscular half, the “yang” tissues. Yin Yoga allows us to work the other half, the deeper “yin” tissues of our ligaments, joints, deep fascial networks, and even our bones. All of our tissues are important and need to be exercised so that we can achieve optimal health and vitality.”
In Yin Yoga all poses are practiced laying down or being close to the floor, we use props to help the body hold poses for longer times starting from two minutes, which is enough for us to remove a lot of tension in the body and get into a more meditative state of the mind.