Короткий опис(реферат):
The article discusses the effect of inhalation of highly concentrated oxygen on the state of the cardiorespiratory reserve during steady-state exercise.
Material and methods. Commonly, 25 aerobically untrained men were measured and tested. The subjects measurable averaged to a mean weight of 76.8±15.6 kg, a mean height of 172.5±5.8 cm, and a mean age of 22.7±3 years. The variables that were measured and recorded were rating of perceived exertion (RPE), respiratory exchange ratio (RER), heart rate (HR), VO2 relative and VO2 absolute. After primary measurement, immediately following their warm-up, the subjects self-administered five deep inhalations of the oxygen canister, containing 95% concentrated oxygen (Tesla's Secret by Eco Medical Europe Ltd Oxygen Breathing Mixture). The subjects attempted to maintain veloergometry during inhalations.
Results. During the entire observation period, there was a lower perceived exertion at 8 minutes of observation, as well as a decrease in recovery time after inhalation of highly concentrated oxygen (p <0.05). While analyzing the heart rate before and after inhalation of highly concentrated oxygen, the increase in heart rate at 2, 6, 8 minutes of physical activity was less than similar indicators before oxygen inhalation (p <0.05).
After inhalation of highly concentrated oxygen, a lower level of pressure in the cardiorespiratory system was observed - due to a decrease in RER by 2, 4, 6, 10, 12, and 15 minutes (p <0.05) with the same initial value during warm-up. A lower heart rate was observed during warm-up, as well as at 2, 8 and 15 minutes of observation after inhalation of highly concentrated oxygen (p<0.05). Significant shortening of the recovery time was set (p<0.05).
The absolute oxygen pressure increased at all stages of observation by 20-50% - at the 2nd, 4th, 8th, 10th, 12th, 14th minutes of physical exertion and during the restitution period (p <0, 05).
Physical efficiency, with the use of inhalations of highly concentrated oxygen, increased in 2.3 times. The percentage of increase in double product (DP) was 25.5% (p <0.05). Accordingly, the chronotropic reserve index increased by 14.3% and the inotropic reserve index by 16.2%.
