It is known that aerobic and anaerobic abilities are same importance in the developmental stages. Anaerobic capacity is described in this paper through known facts and scientific papers. Considering the physiology, anatomy and other determinants to which we are predetermined, we understand that they dictate the specialization of the swimming technique and specific distance which the swimmer will reach the highest-level performance. In addition to the conditional items, an external environment such as the expertise of the staff who work with swimmers from the earliest days to the end of their sports career is extremely important. In today's time of great availability of information’s, we are guided by methods and scientific knowledge in order to create a high-quality plan and program that is a safe guide to our goal. The intensity, extensity and total volume of the training load has a different effect on the swimmer's energy processes, therefore it is important to know in which intensity zone the swimmer is at all the progress to reduce coincidences to a lowest level. By developing functional abilities, we ensure the highest level of sport form for the competitive performance of this wonderful sport.