The Breath

Breath work is an essential part of tai chi and qigong practice.  We learn to breathe slowly and deeply with each movement. Breathing in this way helps us to relax and to oxygenate our cells.  When our cells are fully oxygenated we can better ward off virus, bacteria and other types of organisms. 

The great mindfulness teacher Thich Nhat Hanh wrote a book titled How to Relax.  Here is a passage from that book.