Describes the anatomy and physiology of breathing, as well as the subtle yogic science of prana.For thousands of years, yogic adepts have claimed that breath is the essential link between body and mind, energizing a "subtle body" which connects the physical and mental aspects of our being. In this landmark book, Swami Rama and two noted American physicians explore the science of breath as the missing key to both physical health and the attainment of higher states of consciousness. Basic yogic breathing techniques are explained so that we can immediately begin working with this powerful ancient science.