People usually breathe very shallow, so that only the central part of the lung or the upper air, but the biggest part of the lung "at the end of the lung", but not to campaign, so the lungs are still at the bottom of the remnants of the old air precipitation. The precipitation of the air easily spread bacteria, such as cold, asthma, lung disease, is the result.
So yoga focus on small and profound relief of breathing, so that can be inflated at the end of the lung to be in the air by precipitation from in vitro, and therefore be able to tell, often practicing yoga, is not vulnerable to infection, and health than most people .