Laws of development of chronotropic reserves under physical exercises

Laws of development of chronotropic reserves under physical exercises

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Teoriya i praktika fizicheskoy kultury №1 2017, pp. 19-20

UDC 796.01:612

Associate Professor, Dr.Med. A.L. Pokhachevskiy1
Professor, Dr.Med. M.M. Lapkin2
Dr.Med. S.V. Bulatetskiy3
Doctor of Laws A.A. Krymov1
PhD А.V. Platonov4
PhD Y.М. Reksha1
PhD A.B. Petrov5
1Academy of the FPS of Russia, Ryazan
2Ryazan State Medical University n.a. Academician I.P. Pavlov, Ryazan
3Ryazan Branch of Kikot Moscow University of the Ministry of Internal Affairs of Russia, Ryazan
4Vologda State University, Vologda
5Lesgaft National State University of Physical Education, Sport and Health, St. Petersburg

Dynamics of physical exercise (PE) tolerance is connected with elaboration of cross effects of adaptation that determine survivability and high training level. The research objective was to study distribution of differences in successive cardio intervals (CI) of the cardiac rhythmgram for the 1–3 minutes of load testing and their relation to the PE tolerance to reveal laws of its elaboration. There was examined a mixed population (68 persons) of apparently healthy high-school children and students. We performed maximal ergometry testing, results of which: Ras and performance of the left ventricle (PLV), calculated according to the formula: (W / HR) × 100, where HR is the heart rate at the peak of loading, W is the maximal load in Watts, are analyzed using the correlation (Spearman) method. Distribution of differences of CI at early stages of adaptation to PE has its defining characteristics that determine its maximal tolerance. Specifics of interrelation of the PE tolerance maximum are determined, firstly, by the presence of the central range of CI (inverse relationship with PE tolerance) limiting the loading tolerance and two peripheral ranges (to the left and to the right) from the central one, CI of which realize the maximum of the tolerance (direct relation to the tolerance). At that, the central range of values is narrowed from the 1 to the 3 minute of loading, and peripheral ones are widened.

Keywords: heart beat lability, criteria, markers, loading tolerance, cardiac rhythmgram, maximal load test.

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