[Oxygen consumption by resting humans at different Elbrus altitudes]

Area of Science:

• Human physiology
• Environmental medicine
• Altitude research

Background:

• The "hypoxic paradox" proposes that oxygen consumption remains constant or increases in hypoxic conditions.
• Understanding human physiological responses to altitude is crucial for various fields, including mountaineering and aerospace medicine.

Purpose of the Study:

• To experimentally validate or refute the "hypoxic paradox" in normal humans.
• To statistically analyze oxygen consumption at different altitudes.
• To develop a mathematical model for oxygen consumption relative to altitude.

Main Methods:

• Controlled experiments involving 4 human volunteers.
• Measurements of oxygen consumption at near-basal metabolic rates.
• Data collection at two distinct altitudes (2224 m and 4200 m) above sea level.

Main Results:

• Oxygen consumption in resting humans significantly decreases as altitude increases.
• The "hypoxic paradox" was experimentally invalidated.
• An analytical expression was derived to model oxygen consumption changes from sea level to 4200 m.

Conclusions:

• Human oxygen consumption declines with altitude, contrary to the "hypoxic paradox."
• The developed analytical expression provides a quantitative description of this altitude-dependent physiological response.