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Jet lag is not tiredness — it is your internal clock insisting it is 3am while your destination serves lunch, and no amount of coffee fixes a clock that is running on home time. What does help is signalling: light at the right local times is the strongest reset tool there is, followed by sleep anchored to destination night and caffeine treated as a timing instrument rather than a comfort drink. This guide covers the travel-specific version of those strategies — what to do on the plane, what to do in the first three days, and the honest note that crossing more than about six time zones costs two slower days no matter how disciplined you are.
Travel-specific strategies for beating jet lag on the plane and in the first days — light timing, sleep anchors, caffeine rules and when to let your body just catch up.
Your internal body clock runs on roughly a 24-hour cycle set by your home time zone, and it only shifts about one to one-and-a-half hours per day. A nine-hour jump therefore costs several days of mismatch — that is the clock, not your sleep debt.
Light is the strongest clock-setting signal your body has. Seeking bright daylight outdoors at the right local times — morning after eastward travel, late afternoon after westward — shifts the clock faster than naps, melatonin or willpower.
It can help signal bedtime when timed correctly, but doses and timing matter and it is lightly regulated in many countries. The honest sequence is light and sleep anchoring first, melatonin only as a targeted aid for the first few nights.
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