Anhata

The Fourth Chakra, Anāhata Chakra, Heart, Lungs (Air).  

Anodea Judith lists the characteristics of the Fourth Chakra as being "Love, Air, Breath, Balance, Relationship, Affinity, Unity, and Healing."  Her book is Wheels of Life: A User's guide to the Chakra System, Llewellyn, 1992; and the Fourth Chakra is discussed on pp. 204-251.  She lists yoga asanas for the Fourth Chakra as: standing chest opener; backbend (Sphinx, Upward Facing Dog, Cobra) prone position; standing Windmill straight arms shoulder height side to side rotation of waist/back (see also Swinging Arms, Bai Bi Yun Dong); the Fish (Matesendya) supine, standing lateral arm and wrist circles, seated cow head pose.