About the book: year / In this small book we try to present in a simple and clear form the principles of the teachings of Hatha Yoga and provide the rules of physical life corresponding to this teaching yogis. We try to explain each rule. First of all, it seems necessary to us, using the terminology of Western physiologists, to explain to the reader the various functions of the human body and indicate methods consistent with nature, which the reader should learn as best as possible. This is not a “medical treatise”; we are not talking about medicines or treating diseases, we are only pointing out what you should do to get yourself back to the right state of your health. The slogan of this book is Healthy Person. But we think that the methods that bring greater health to a healthy person can improve health to a sick person. Hatha yoga preaches a natural and correct way of life, following which everyone will benefit. This way of life is close to nature and defends the superiority of natural methods over those created by our artificial habits..