The standard arrival experience
You land after a long flight dehydrated, circadian-misaligned, stiff, and sleep-deficient. The first day is lost to fatigue; the second half-lost to adaptation. This is the default. It is not inevitable.
The protocol
24 hours before departure:
- Double your normal water intake. Cabin air is pressurised to ~8,000 feet altitude — desiccating and oxygen-reduced. Pre-hydration buffers against this.
- If crossing four or more time zones eastbound, shift your sleep window one hour earlier for the two nights before departure.
- A 20-30 minute mobility session the morning of travel reduces the muscular stiffness that compounds during long-haul sitting.
In-flight:
- No alcohol. It compounds dehydration and disrupts circadian signalling.
- Water every 90 minutes.
- A 10-minute walk per 3 hours of flight time.
- Melatonin 30 minutes before intended sleep onset on the plane, timed to destination night.
On arrival:
- If it is daytime at the destination, stay awake until local night regardless of how you feel. The first full night is the reset point.
- Sunlight in the first two hours after landing accelerates circadian re-anchoring faster than any supplement.
Prep takes 30 minutes of planning and compresses two wasted arrival days into under 24 hours.
Steady wins.