According to the teachings of Structural Yoga ™  “ Health is not merely determined by the physical body nor is it created by physical exercise alone.  The Sanskrit word for health is svastha, which literally translated means “established in the Self”.  To the yogis, true health is a coming home to your Self.  In the condition of not being at home to your Self, there is dis-ease. For most people however, the bodies are separated, blocked from communicating with each other.  Their energy is irregular, and perhaps dissipated in various directions.  Many Eastern healing modalities like Acupuncture, Jin shin jyitsu, Reflexology and Polarity Therapy treat health problems by correcting the misdirected flow of energy patterns.  Similarly in Yoga training, the proper practice of asana, pranayama and contemplation returns the five bodies (koshas) to a right relationship with themselves.  Hence we are aligned again and re-established with ourselves.  The experience of this is cited in the Siva Sutras III, 16,  “One who is established in a comfortable posture while concentrating on the inner Self alone, naturally becomes immersed in the spontaneous arising of the Heart’s ocean of bliss.”