PhD I.V. Averyanova¹
PhD S.I. Vdovenko^1
1Research Center "Arctic" of the Far Eastern Branch of the Russian Academy of Sciences, Magadan

Objective of the study was to identify the impact of motor activity of young males on gas exchange, external respiration function, and cardiovascular system during the load testing.
Methods and structure of the study. Sampled for the study were the 17-21 year-old young males, permanent residents of the Magadan Region, with different sports levels: usual (low load tolerance) and high (high load tolerance) motor activity modes. The Medgraphics VO2000 metabolimeter was used to record the subjects’ heart rate, gas exchange and external respiration rates in a state of rest and on the 2nd and 3rd minutes of the cycle ergometer test.
Results and conclusions. The analysis of the dynamics of changes in the respiratory coefficient, comparison of the oxygen consumption and carbon dioxide emission rates, as well as the ventilatory equivalent for oxygen and carbon dioxide in the group of young males with the normal motor activity mode, revealed that anaerobic (ventilatory) threshold was reached between the 2nd and 3rd minutes of testing, which was not observed in the group of subjects with the high motor activity mode during the cycle ergometer test.
It was found that a number of characteristics in the young males with low load tolerance indicated inefficient cardiovascular function against the background of reduced oxygen consumption with high exhaled oxygen concentration, which was most evident at the peak of cycle ergometer test load. Such changes in the physiological systems of the body can be used as a prognostic criterion for assessing the level of physical fitness and training of young males during the 3-minute cycle ergometer test.

Keywords: young males, cycle ergometry, metabolism, cardiovascular system.

References

1. Bukov Yu.A., Minina E.N. Sravnitelnaya kharakteristika adaptatsionnykh rezervov respiratornoy sistemy devushek 19-20 let s razlichnym urovnem fizicheskoy rabotosposobnosti [Comparative characteristics of adaptive reserves of respiratory system of 19-20 year-old females with different physical performance levels]. Uchenye zapiski Tavricheskogo natsionalnogo universiteta im. V.I. Vernadskogo, Seriya «Biologiya, khimiya». 2011. v. 24 (63). No. 4. pp. 24-35.
2. Maksimov A.L., Averyanova I.V. Informativnost proby s rerespiratsiey dlya otsenki ustoychivosti organizma yunoshey k sochetannomu deystviyu gipoksii i giperkapnii [Informative value of re-respiration test to assess resistance of young men’s body to combined action of hypoxia and hypercapnia]. Rossiyskiy fiziologicheskiy zhurnal im. I.M. Sechenova. 2017. v. 103, no. 9. pp. 1057-1068.
3. Balady G.J. Clinician’s Guide to cardiopulmonary exercise testing in adults: a scientific statement from the American Heart Association / G.J. Balady, R. Arena, K. Sietsema, R. Milani // Circulation. – 2010. V.  – 122. – P. 191-225.
4. Solberg G. Respiratory gas exchenge indices for estimating the anaerobic threshold / G. Solberg, B. Robstad, O.H. Skjønsberg // J.  Sport Sci. Med. – 2005. – V 4. – P. 29-36.
5. Warburton D.E. Health benefits of physical activity: the evidence / D.E.  Warburton, C.W. Nicol, S.S. Bredin // CMAJ (Can. Med. Assoc. J.). – 2006. – V. 174. – № 6. – P. 801-809.
6. Wasserman K. Determination of the anaerobic threshold by gas exchange. Biochemical considerations, methodology and physiological effects / K. Wasserman, W.W. Stringer, R. Casaburi, A. Koike, C.B.  Cooper // Z Kardio. – 1994. – V. 83. – P. 1-12.