Apnea is a sport where we are limited by the most important physiological need, breathing. The training of an apneist is adapted to this limiting factor and is, therefore, somewhat different from any other sport. Unfortunately, there is very little professional literature, research or scientific articles about apneists, even less in the Slovene language or about Slovene apneists. For this reason, we have decided to write a master’s thesis with the goal of introducing the exercise of apnea of professional apneists. We have done this by surveying three professional Slovene apneists. All were asked the same questions, which were compiled and written on the basis of professional and scientific literature in the field of breath-hold diving or apnea. We have found out that the training of apnea of our three surveyed persons does not meaningfully differ from the exercise principles that we found in professional literature.