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Trace element and hormonal responses during flight aptitude test

A Kobayashi1

  • 1Aeromedical Laboratory, Japan Air Self Defense Force, Tokyo, Japan.

Aviation, Space, and Environmental Medicine
|April 1, 1996
PubMed
Summary

Flight stress significantly alters pilot applicants' zinc and hormone levels, with higher stress responses in top performers. This suggests zinc sequestration by the liver during hormonal changes.

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Area of Science:

  • Aerospace Medicine
  • Human Physiology
  • Biochemistry

Background:

  • Investigating physiological responses to flight stress is crucial for pilot selection and performance.
  • Understanding the interplay between trace metals and stress hormones offers insights into human adaptation.

Purpose of the Study:

  • To quantify changes in trace metal (zinc, copper) and hormone (noradrenaline, adrenaline, cortisol) levels during flight tests.
  • To explore the relationship between hormonal responses and pilot flying performance.

Main Methods:

  • Measured urinary zinc, copper, noradrenaline, adrenaline, and salivary cortisol in 67 pilot applicants and 30 instructor pilots.
  • Analyzed levels across four flight tests, comparing pre- and post-flight samples.

Main Results:

  • Pilot applicants showed decreased urinary zinc and increased noradrenaline, adrenaline, and cortisol post-flight.
  • Higher hormonal responses were observed in the best- and worst-rated applicant groups.
  • Urinary zinc levels negatively correlated with adrenaline.

Conclusions:

  • Flight stress induces significant changes in urinary zinc and key stress hormones in pilot applicants.
  • Elevated adrenaline may lead to zinc sequestration by the liver during stressful events.
  • Hormonal and zinc level dynamics provide insights into physiological stress responses in aviation.

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