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Man at extreme altitude

Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology

|June 1, 1982

Summary

This summary is machine-generated.

Human physiology at extreme altitudes has been studied since early ballooning exploits. Research shows high-altitude climbing is possible due to higher-than-expected barometric pressure and extreme hyperventilation.

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Area of Science:

Physiology
Altitude Medicine
Human Performance

Background:

Historical attempts to understand extreme altitude physiology date back to ballooning expeditions.
Early research focused on hypoxia and barometric pressure, with Paul Bert's work in low-pressure chambers being a turning point.

Observation:

Mount Everest's summit (8,848 m) is near the limit of human tolerance without supplemental oxygen.
The 1981 American Medical Research Expedition to Everest gathered crucial data above 8,000 m.

Findings:

Climbing Everest without supplemental oxygen is feasible because summit barometric pressure is higher than anticipated.
Extreme hyperventilation is a key physiological adaptation enabling humans to tolerate extreme altitudes.

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Implications:

Understanding human physiological limits at extreme altitudes informs mountaineering safety and future exploration.
Further research can refine predictions of human performance in high-altitude environments.