Changes in physiological indicators of anaerobic performance under normobaric hypoxic exposure
Dr. Biol., Professor R.V. Tambovtseva1
PhD, Associate Professor Y.L. Voitenko1
PhD, Associate Professor A.I. Laptev1
1Russian State University of Physical Education, Sports, Youth and Tourism (SCOLIPE), Moscow
Objective of the study was to determine the level of tolerance of the physiological systems of athletes working in the anaerobic mode to normobaric hypoxic exposure.
Methods and structure of the study. The study was carried out at the premises of the Research Institute of Sports and Sports Medicine (Russian State University of Physical Education, Sport, Youth and Tourism). Sampled for the study were the active highly-skilled swimmers (Group 1 - n=10, Group 2 - n=10). The individual glycolitic anaerobic power and capacity were tested in Wingate test on a Monark Ergomedic 894E Peak Bike vertical cycle ergometer (Sweden): three times of 90'' with the rest intervals of 180". The following indicators were recorded: relative working capacity (W/kg), maximum working capacity per unit of time (W/kg), average working capacity (W/kg), fatigue coefficient (c.u.), relative maximum oxygen (O2) consumption (ml/min/kg), absolute oxygen consumption (l/min), carbon dioxide (CO2) content in the exhaled air (l/min), lung ventilation (l/min), ventilatory equivalent for O2, heart rate (HR), HLa. The following gas exchange indicators were recorded: lung ventilation, O2 and CO2 contents in the exhaled air; O2 consumption, and other related comprehensive diagnostic parameters. HR was measured on the cycle ergometer using Polar T34 pulsometer (Finland). HR and blood oxygenation during the hypoxic tests were recorded in three stages: at rest – before the hypoxic exposure, for 1 min; during the 30-min exposure to the 9% O2 gas mixture; after the hypoxic exposure (recovery period) – under normal breathing conditions, for 3 min.
Results and conclusions. The findings showed an ambiguous reaction of the body of athletes to the single and multiple hypoxic exposure when working in the anaerobic mode. The multiple hypoxic exposure in the anaerobic mode decreases many physiological indicators, especially working capacity. The efficiency of hypoxic exposure is largely determined by the rate of recovery of the functional systems of the body and individual hypoxic tolerance rate. The use of hypoxia with the low content of O2 in the inhaled air adversely affects many functions of athletes’ body.
Keywords: athletes, working capacity, hypoxia, anaerobic load.
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