In contrast to most yoga asana practices, which involve muscular effort, yin yoga uses gentle passive pressure in longer-held seated or lying-down postures to address deeper tissues, such as the extensive, intricate web of fascia which provides support and space for the structures of the body. The intention of yin yoga is to bring awareness to and release physical and energetic restrictions in deeper tissues. In addition to physically complementing yang forms of yoga and other exercise, yin cultivates mental calmness by emphasizing receptivity, softness, and sustained attention.