Breathing is life. The lungs control a person's vital energy. Difficulty breathing immediately causes health problems. But if you provide the body with sufficient oxygen, a person will live a long time and not get sick. This book is about how to maintain health with the help of breathing - one of the main functions of the human body - and live a happy and active long life. “Breathing practices” are suitable for everyone : both for those who have just begun their path to health, and for those who have been practicing classes according to the Katsuzo Nishi Health System for a long time. This book describes in detail and consistently the technique of performing breathing exercises; about managing emotions with breathing; about the influence of air in different geographical zones on the body. There are many different breathing exercises and practices: from the simplest to the most complex.