"Freediving - The Physiology" is a complete guide for the three levels of freediver training, the three levels of instructor training, and for the instructor trainer. The book works as a manual for everyone, introducing all readers to the greatest secrets of the human body's responses to freediving, from the new freediver to the doctors who look to expand their knowledge in freediving. A new freediver will find chapters on ear equalization, the diving reflex, the mechanism of apnea, the factors of breath-hold, the danger of shallow water blackout, advice on a special diet before and during the freediving day, and many more interesting subjects for a beginner in freediving. Experienced freedivers will enhance their knowledge of deep freediving, safety rules and rescue techniques, through subjects including the human diving responses, specialized advice on deep freediving lung equalization, advanced ear equalization methods, special factors and methods for increased apnea duration, safety rules on avoiding hyperventilation and a hypoxic state (hypoxia - blackout or LMC - loss of motor control), the rescue methods for the hypoxic diver, advice on thermal problems and hypothermia, a chapter about special diet methods for increased performances in freediving, as well as an abundance of knowledge crucial for expanding their performance underwater and correcting possible mistakes. Deep freedivers, instructors and doctors will all find everything there is to know about freediving physiology in this book! Extreme freediving has its place in every chapter of the book, covering aspects of great wonder and mystery to be researched, such as methods in reducing the brain's oxygen consumption during apnea, lung equalization and the diving reflex at great depths, gas narcosis in deep freediving, freediving decompression sickness, lung packing dangers and others.