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SESK: Stuff Everyone Should Know · sesk.info/pilot-acute-fatigue-cure

According to the FAA, what normally cures acute fatigue?

Rest and about 8 hours of sound sleep.

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  1. A cup of coffee before the flight
  2. Breathing extra oxygen in flight
  3. Rest and 8 hours of sound sleep ✔

Why: Acute fatigue is the short-term tiredness you feel after hard work, excitement or too little sleep. The PHAK says rest and 8 hours of sound sleep ordinarily cure it. If you feel it, stay on the ground.

Huh, didn't know that: Chronic fatigue, which lasts a long time, is not fixed by diet and rest and may need a doctor.

The dad joke
Why did the tired pilot stay on the ground? He did not want to fall asleep at the wheel, or the yoke.
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References

Answer: Rest and 8 hours of sound sleep. Acute fatigue is the short-term tiredness you feel after hard work, excitement or too little sleep. The PHAK says rest and 8 hours of sound sleep ordinarily cure it. If you feel it, stay on the ground.

  1. PHAK FAA-H-8083-25C Chapter 17, Aeromedical Factors www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/phak/19_phak_ch17.pdf
    Rest after exertion and 8 hours of sound sleep ordinarily cures this condition.
    Checked 2026-10-09.

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