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INFLUENCE OF THE MEDIUM-CHAIN FATTY ACIDS ON THE DIFFERENT INTENSITY PHYSICAL EXERCISE IN CROSS-COUNTRY SKIERS

A. YU. LYUDININ A, E. R. BOYKO INSTITUTE OF PHYSIOLOGY OF RUSSIAN ACADEMY OF SCIENCES URAL BRANCH, SYKTYVKAR, RUSSIA

Objective: the aim of the study was to characterize the functions of the medium-chain fatty acids (MCFAs) during test and competitive loads in highly trained athletes.
Materials and Methods: 13 skiers, members of the national team of the Republic of Komi, aged 18 – 27 years were examined. A blood samples were taken at rest, at the load peak of a bicycle exercise, and after the end of an endurance race. The level of plasma MCFAs was investigated by gas chromatography.
Results: a lowered level of the total plasma MCFAs (1,4 ± 0,2 mg/ml) was found in athletes in the preliminary period. The maximal ergocycle test and participation in competitions have modified the profile of MCFAs similarly, including significant increase of the level of capric acid (C10:0), lauric acid (C12:0), and myristic acid (C14:0) and no change in the long-chain fatty acids values.
Conclusions: the identified changes in the profiles of MCFAs at maximum and high intensity exercise indicate the activation of the MCFAs oxidation.
Keywords: 
medium-chain fatty acids; saturated fatty acids; ergocycle test; endurance; cross country skiers.