Specifics of physiological mechanisms of gas exchange regulation in the lungs of swimmers of different ages

The article shows the features of physiological mechanisms of gas exchange regulation in the lungs of swimmers in the age ranges of 9-10, 11-13 and 14-16 years when performing physical loads of different power. The regulation efficiency of gas exchange processes has been determined by the concentration of major respiratory gases in the exhaled air samples using a radio-measuring gas analyzer such as PHA-KM (for oxygen analysis), an electrochemical optical gas analyzer PHA-DUM (for carbon dioxide analysis) and statistical data analysis. The studies have been conducted in the initial state of the rest and when performing a standard bicycle ergometric test of step-increasing load, which provided for the performance of at least 3 minutes of work in the following modes: aerobic, aerobic-anaerobic, anaerobic-aerobic, anaerobic glycolytic. As a result of the conducted researches it has been established that the increase of power and intensity of work at each subsequent stage of a loading causes features of regulation of gas exchange of different age of swimmers...