This book could be used in order to learn the Buteyko breathing method exercises even by people with poor results for the body oxygen test or the Buteyko CP 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 other descriptions of Buteyko breathing exercises, in the following areas:
The book does not include description of those lifestyle changes (related to sleep, physical exercise, diet and so forth) that lead to increased body oxygenation. It focuses on practice and progress related to the Buteyko breathing exercises.