This is the definitive guide, illustrated and up to date, for the aspiring apneist. From theory to practice this manual will accompany the reader in the discovery of a fascinating sport. It is a manual that should not be missing from the itinerary of any diver (apneist or otherwise) who wishes to improve their techniques of respiration, swimming and diving whilst broadening knowledge and theory. Dozens of underwater exercises, illustrated with helpful sequences of pictures allow both students and instructors of apnea to follow a simple and effective teaching path. From the experience of two sportsmen, with years dedicated to competitive and instructive apnea, finally a manual that unites theory with practical experience.