Breathing is such a natural process that it can be viewed in the same way as we see polarity all around us. Polarity forms the essence of being, such as night and day, dark and light, sleep and wake, ultimately life and death. Like many other bodily functions, breathing is usually a subconscious process, even when exercising and rate of respiration increases. Introducing a voluntary dimension to breathing enables us to harness various benefits, most notably to reduce feelings of stress and anxiety.

Breathing mechanics

Mastering breathing exercises can improve cardiac function, decrease the effects of stress and improve both mental and physical health.

During inhalation the diaphragm contracts and moves downwards; simultaneously the small intercostal muscles pull the ribs up and out which together result in an increase in volume in the thoracic cavity. This in turn causes a decrease in the pressure within the chest and because air naturally flows from areas of high pressure to areas of low pressure, air is drawn in from the atmosphere travelling through the nostrils, throat, larynx and trachea, eventually to the lungs. As the diaphragm and intercostal muscles relax, the rib cage returns to its original size, increasing the pressure within and so forcing the air out.

The real magic occurs at a microscopic level within tiny air sacks in the lungs called alveoli. This is where oxygen is taken up by the red blood cells and carbon dioxide is off-loaded into the air to be expelled. The oxygenated blood flows through the venules, back to the heart via the pulmonary veins and is then pumped through the systemic arteries to deliver this vital fuel throughout the body. Whilst the medulla is the part of the brain that maintains automatic control of the breathing function, it is the cortex that is linked to voluntary control of self-initiated changes such as before vigorous effort like singing or playing a wind instrument.

When feeling stress, the sympathetic nervous system is stimulated which can lead to tightness in the respiratory muscles. As a result, the chest expansion is restricted and shallow, more rapid breathing occurs. This is sometimes referred to as chest breathing and is inefficient because only the upper part of the lungs are engaged in the process when in fact the lower lobes of the lungs are where there is greater blood flow and so potential for removing toxic carbon dioxide and absorbing more energy-giving oxygen.boxed-text