Yoga physiological benefits

Introduction 

Lack of western research. At the commencement of this article, it is worthy to note that despite Yoga being thousands of years old, little western scientific research exists (ie double-blind studies) to explain the physiological benefits of Yoga.  The majority of information that is available on the (perceived) benefits stems from many people who are very serious students of the subject (My Iyengar, Sri K. Pattabhi Jois etc) and whose viewpoints must be treated with respect.   The cynical side of me suggests that the lack of western research, manifest from the little financial benefit that could flow to Pharmaceutical Companies through such research and thus little research is funded (Black, 2000-2001).  I believe however that it is important to find scientific explanations for the perceived benefits of yoga.

(Perceived) Physiological benefits.  It appears clear from my direct experience (and easy to perceive) that yogic asanas maintain normal body physiological functions.  Asanas clearly stretch the muscles and increase their tone.   The stretching massages the organs in the local vicinity, stimulates blood circulation and increases their secretion.  Moreover, yogic processes have a tremendous influence on the central nervous system, helping gain control over the autonomic nervous system resulting in homeostatic functioning of the body.   These benefits I feel in my body, and moreover am supported by many qualified Yoga and medical practitioners.

Article structure. This article addresses the following points to describe on the physiological effects of two (2) asanas – Salamba Sirasana (Headstand) and Virabhadrasana II (Warrior II):

• Short description or illustration of the asana
• Identification of area of body that is affected by the asana
• The detailed description of the effects
• A description of the body systems from where these effects arise
• References