One of the most important problems of training volleyball players is the development of motor abilities and, in particular, endurance. Many researchers note that endurance is a common property of the human body, which finds a specific manifestation in various types of motor activity, including sports. In other cases, endurance is the ability of the body to perform any physical activity for a long time without reducing its effectiveness, in other words, endurance is opposed to the process of fatigue. A number of authors, along with General and special endurance, distinguish high-speed, high-speed-power, power, local, regional, global, and in some cases universal, long-term, short-term, and static endurance as a type of special endurance. A common component for all types of endurance is volitional tension, through which the intensity is maintained, but up to a certain limit. However, endurance should be distinguished from such a concept as human performance. Despite various formulations, all authors agree that efficiency is the maximum work that a person can do, that is, the ability to perform the maximum amount of work possible for them. Now the effectiveness of aerobics is generally recognized. Aerobics is a set of endurance exercises that last for a relatively long t ime and are associated with achieving a balance between the body's oxygen needs and its delivery. The body's response to increased oxygen demand is called a training effect or positive physical shifts. To develop such physical qualities as endurance, volleyball players need to include various types of physical training in their training. When performing physical exercises, some changes occur in the body: the total volume of blood increases so much that the ability to transport oxygen improves, and therefore the athlete shows greater endurance during strenuous physical exertion. Having analyzed the modern scientific and methodological literature and the latest ways of using fitness varieties. We can say that fitness technologies develop, strengthen, correct and generally improve the physical fitness of athletes, as well as improve the individual physical quality of each athlete, which required more attention. Aerobics helps to cope with physical and emotional stress. Therefore, volleyball athletes who include in their training fitness programs aerobic load much faster improve their physical qualities, namely endurance.
Calculating the Flowfield Behaviour of High-Speed Multi-Stage Compressors
