Annotation. A person`s working capacity, in particular a sportsman`s capacity, is mainly conditioned by the amount of oxygen taken from air into blood of pulmonary capillaries and delivered into tissues and cells. Without external respiration indices determination it is impossible to judge a sportsman`s degree of training level and his reserve capacities. Moreover, without external respiration indices study it is impossible to reveal latent diseases or propensity for them. Material. The article presents the dynamics of respiratory system indices among young biathlonists and biathlonists adults during a long-term training. The research was held with the help of "Spirolab III" apparatus, which fulfills spirometric testing of external respiration functions, among biathlonists of the Udmurt Republic in three age groups. Research methods: scientific literature analysis and summarizing, spirometric testing, documents and archive materials analysis, respiratory system study with the help of "Spirolab III" apparatus, method of mathematical statistics. Results. According to the research results comparative analysis of "proper" and actual values was held, then the interconnection between sports result and respiratory system indices was revealed.
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