Hypoxia Hangover and Flight Performance After Normobaric Hypoxia Exposure in a Hawk Simulator

Area of Science:

• Aviation Physiology
• Aerospace Medicine
• Human Factors in Flight

Background:

• Increasing incidence of hypoxia-like symptoms in military aviators.
• Potential causes include OBOGS malfunction, air contamination, and cabin depressurization.
• Normobaric hypoxia training is utilized to mitigate these risks.

Purpose of the Study:

• To evaluate the impact of normobaric hypoxia training on flight performance.
• To assess cognitive functions and recognize individual hypoxia symptoms in aviators.
• To refresh hypoxia emergency procedures in a simulated tactical fighter environment.

Main Methods:

• 16 subjects underwent normobaric hypoxia exposure (8%, 7%, 6% O2) in a Hawk simulator.
• Flight performance was evaluated during return to base (RTB) post-exposure.
• A control flight was conducted for comparison.

Main Results:

• Instrumental flight rule performance significantly decreased post-hypoxia exposure.
• Pilots reported adverse effects like fatigue, headache, and cognitive impairment up to 12 hours after training.
• The 'oxygen paradox' may contribute to decreased flight performance.

Conclusions:

• Hypoxia training significantly affects flight performance and cognitive function.
• The 'hypoxia hangover' can impair aviators even after emergency oxygen administration.
• Understanding these effects is crucial for flight safety and training protocols.