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Catecholamine excretion in A-10 pilots

G S Krahenbuhl, S H Constable, P W Darst

    Aviation, Space, and Environmental Medicine
    |July 1, 1980
    PubMed
    Summary
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    USAF pilots experienced significant stress during A-10 surface attack training, with elevated catecholamine excretion observed in both simulators and actual flights. The stress response lessened in simulators but remained constant during real aircraft sorties.

    Area of Science:

    • Aerospace Medicine
    • Human Physiology
    • Military Psychology

    Background:

    • Aircrew performance is critical in military aviation.
    • Understanding the physiological stress response in pilots is essential for training and safety.
    • The A-10 aircraft and surface attack missions represent unique operational demands.

    Purpose of the Study:

    • To quantify catecholamine excretion in USAF pilots during A-10 surface attack training.
    • To compare the physiological stress response between simulator training and actual flight conditions.
    • To investigate the temporal changes in stress response during training progression.

    Main Methods:

    • 15 United States Air Force (USAF) pilots participated in the study.
    • Timed urine samples were collected to measure epinephrine and norepinephrine excretion rates.

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  • Measurements were taken during basal conditions, simulator sorties, and actual flight sorties.

    • Main Results:

    • Catecholamine excretion was significantly elevated (p < 0.05) during all 11 training sorties compared to basal rates.
    • The stress response diminished across trials in the simulator but remained steady during actual flights.
    • Relative proportions of epinephrine and norepinephrine shifted in final sorties, with increased norepinephrine and decreased epinephrine.

    Conclusions:

    • A-10 conversion and surface attack training induce a significant physiological stress response in pilots.
    • Simulator training may attenuate the stress response over time, unlike actual flight.
    • Altered catecholamine profiles in later sorties suggest adaptation or specific mission phase stressors.