There are many "Energy Medicine" breathing techniques that have been used over thousands of years. This one, a "tool of change" we call the 4 x 4 breath, it is simple and very effective. Prana/chi is a life-giving force that is present within each breath you take. Consider using this to help you relax, get more oxygen around the body, calm your mind. Many people have reported feeling less anxious, able to control nervousness and use it as a meditative tool for re-centering.