Updated: Apr 12, 2020
During this COVID-19 pandemic, standard recommendations have been given to help lower one’s risk of catching the virus, such as frequent hand washing, using masks, social distancing, etc. Aside from this list, there is 1 major factor that can have a huge impact on our health, and that is our mode of breathing.
Physiologically, humans have the ability to breathe through the mouth or the nose. However, there are significant differences in how each of these modes of breathing influence our bodies and our health.
Breathing through the nose is the first line of defense against airborne disease. During nasal breathing, the nose warms, moistens, and filters the air that enters the body and protects us from viruses. The paranasal sinuses in the nasal cavity also produce Nitric Oxide, which is a powerful anti-bacterial, anti-viral, and anti-inflammatory agent, and can only be accessed through nasal breathing.
Mouth breathing does not offer any of the above-mentioned benefits. In fact, mouth breathing allows the bacteria in the air to directly enter the body, increasing the risk of contracting illnesses. Additionally, mouth breathing causes the breath to remain shallow in the upper chest instead of filling deep into the diaphragm. This shallow, upper chest breathing activates the sympathetic nervous system (aka “fight or flight”), which causes the body to release increased levels of cortisol, the primary stress hormone. High levels of cortisol lead to feelings of anxiety and stress and actually suppress the immune system.
Addressing poor breathing habits helps to bring the body into relaxation mode by activating the parasympathetic nervous system (aka "rest and digest"). Re-training the body to breathe nasally, using slow, light, diaphragmatic breathing, is significant in reducing stress and anxiety and strengthening the immune system.
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