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The Jet Lag Plan

Jet lag

Jet lag after 50: why it hits harder and what helps

Jet lag is a timing problem, not a tiredness problem. After 50, the body clock is less flexible and sleep is lighter, so the same flight costs you more. Here is what the published guidance actually says to do.

9 min read. Last updated 2026-09-01.

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What jet lag actually is

Your body runs on an internal clock that governs sleep, alertness, digestion, and body temperature. Fly across several time zones and that clock stays on home time while the sky, your meals, and your hotel insist otherwise. Jet lag is that mismatch rather than the flight itself.

  • Symptoms: broken sleep, daytime flatness, poor concentration, appetite and bowel changes
  • Rule of thumb in published guidance: roughly one day of adjustment per time zone crossed without a plan
  • Eastward travel is usually harder than westward, because the clock resists being pushed earlier

Why it gets harder with age

Several ordinary age-related changes stack up. Sleep becomes lighter and more fragmented, so the poor nights cost more. The clock shifts earlier, which clashes further with eastward travel. And melatonin output and light sensitivity change, so the signals your body uses to re-set are weaker.

  • Less deep sleep means less recovery from each night
  • An already-early body clock makes eastward shifts feel steeper
  • Medicines for blood pressure, sleep, or mood can add daytime drowsiness
  • Cataract surgery and lens changes alter how much light reaches your clock

The three levers that matter

Almost all credible jet lag advice comes down to light timing, sleep timing, and (cautiously) melatonin timing. Caffeine and meals help at the margins.

  • Light is the strongest signal: get it at the right hour and avoid it at the wrong one
  • Eastward: seek morning light at destination, avoid bright evening light
  • Westward: seek late-afternoon and evening light, avoid very early morning light
  • Shift your bed and wake times by no more than 1–2 hours a day
  • Keep caffeine to the destination's morning and early afternoon

A realistic plan for a long eastward flight

Start three days out, not the night before. Small shifts done early save you days at the other end.

  • Days −3 to −1: move bedtime and wake time 30–60 minutes earlier each day
  • Get bright light soon after waking on those days
  • On the plane: set your watch to destination time and sleep only in the destination's night
  • Arrival day: get outside in the morning; avoid a long afternoon nap
  • Days +1 to +4: hold the new wake time even on a bad night

What to skip

A lot of jet lag advice is confident and unsupported. Alcohol on board makes sleep shallower. Elaborate 'fasting protocols' are hard to follow and thinly evidenced. And going straight to bed on arrival at 2pm usually buys you a worse night.

  • Alcohol as a sleep aid, because it fragments the second half of the night
  • Naps longer than 30 minutes after mid-afternoon
  • Any supplement you have not run past a pharmacist

Things worth buying properly

Melatonin

Budget · $8–$20

A timing tool rather than a sleeping pill, and a conversation to have with your doctor.

What to look for

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Common questions

How long does jet lag last after a 10-hour flight?
Without a plan, published guidance suggests roughly one day per time zone crossed, and eastward trips are usually slower. Timed light exposure and gradual bed and wake shifts of 1–2 hours a day typically reduce that meaningfully.
Is jet lag worse as you get older?
Many older travellers report it is. Sleep is lighter and more fragmented with age, the body clock tends to run earlier, and the light and melatonin signals used to re-set the clock weaken, so the same flight tends to cost more recovery.
Should I take melatonin for jet lag?
Melatonin is used as a body-clock timing tool rather than a sleeping pill, and timing matters more than dose. It interacts with several common medicines and is prescription-only in many countries, so ask your doctor or pharmacist before using it.
Which direction of travel causes worse jet lag?
Eastward travel is usually harder. The body clock adapts more easily to being delayed (westward) than advanced (eastward), which is why eastward plans lean on early morning light at the destination.

Public sources we relied on

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