SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/wt-jetlag-light

What environmental factor is key to resetting your body clock after flying?

Light at the right time helps reset your body clock.

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  1. Full darkness all day
  2. Wind
  3. Light exposure ✔

Why: Light helps sync your internal clock with the world around you. Getting light, or avoiding it, at the right times can shorten jet lag.

Huh, didn't know that: CDC suggests going outside for daylight on your destination's schedule to ease the shift.

The dad joke
Sunlight abroad is free, and it resets your clock faster than my coffee resets me.
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References

Answer: Light exposure. Light helps sync your internal clock with the world around you. Getting light, or avoiding it, at the right times can shorten jet lag.

  1. Jet Lag Disorder (CDC Yellow Book) www.cdc.gov/yellow-book/hcp/travel-air-sea/jet-lag-disorder.html
    Light helps to synchronize the internal biologic clock to the environment even in the absence of travel.
    Checked 2026-10-12.

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