This book can be used in order to learn the Buteyko breathing method exercises even by people with low results for the body oxygen test (less than 15 s). However, the best results, in cases of self-learning (or DIY methods), are achieved when the learner already has at least 25 s for the body oxygen test.This Kindle and PDF book is advanced, in comparison with popular descriptions of Buteyko breathing exercises, in the following areas:- The book describes relaxed breathing exercises for people with hypertension and panic attacks. These groups of learners are often unable to safely do breath holds and practice ordinary Buteyko reduced breathing exercises. Air hunger can worsen their symptoms.- The book explains how to proceed from easy Buteyko breathing exercises to its more advanced types. This relates to breathing exercises with a moderate and strong degree of air hunger.- Chapter 4 of this book provides practical scripts for the use of visualization and imagery during Buteyko breathing exercises.- The book explains optimum and maximum durations for Buteyko breathing sessions. It also describes the phenomenon of overtraining due to Buteyko breathing exercises and steps that are necessary in order to solve this problem.- Chapter 5 explains the phenomenon of a lost CO2 sensitivity, which should not be confused with the blunted CO2 sensitivity. The book provides practical step-by-step instructions how to overcome both of these health challenges using lifestyle changes and other special methods. - The book describes instructions for application of Buteyko breathing exercises during physical activity.- Chapter 6 describes the "click effect" that leads to nearly instantaneous transition to much better results for the body oxygen test (the CP test). For some (lucky) students, the click effect helps them to quickly break through 40 s threshold for the morning CP and achieve astonishing health benefits. These health effects include natural cravings for physical exercise and raw foods, sleep that is no longer than 4.5 hours (without trying), amazing clarity of mind, very high energy levels and other natural changes.The book does not provide any clinical evidence related to prevalence of overbreathing in general population and people with chronic diseases, such as asthma, cancer, heart disease, diabetes, and many others. This clinical data can be found in other Amazon Kindle books and articles written by Dr. Artour Rakhimov.The book does not include description of those lifestyle changes (related to sleep, physical exercise, diet and other factors) that lead to increased body oxygenation. It focuses on practice and progress related to the Buteyko breathing exercises.