Jet lag happens when your internal clock is out of sync with the local time at your destination. Your body thinks it's 3 AM when everyone else is having lunch. The more time zones you cross, the worse it gets. But jet lag isn't inevitable. With the right strategy, you can minimize it or even prevent it entirely.
Your circadian rhythm is set by light exposure and meal timing. When you fly across time zones, your body is still operating on your home schedule. It takes about 1 day per time zone crossed to fully adjust naturally. So a 6-zone flight takes about 6 days to recover from without intervention. With intervention, you can cut that to 2-3 days.
Start shifting your schedule toward your destination time zone:
Light is the strongest signal for resetting your circadian clock. Use it strategically:
Eat meals at local times. Your digestive system has its own circadian clock, and eating at destination times helps reset it. A heavy breakfast at local morning time is especially effective at signaling "it's daytime."
Exercise helps reset your clock, especially outdoors in sunlight. A morning run or walk after arrival is one of the most effective jet lag interventions. Avoid vigorous exercise close to bedtime.
Plan your sleep at your destination with our free Sleep Calculator to help your body adjust to the local time zone.
East. Traveling east means you need to advance your clock (go to bed earlier), which is harder for most people than delaying it (going to bed later). This is because the natural human circadian rhythm tends to run slightly longer than 24 hours, making it easier to stay up later than to fall asleep earlier.
Yes. Older adults have less robust circadian rhythms and take longer to adjust to time zone changes. They also tend to have more sleep issues in general, which compounds the jet lag effect.
Yes, but it's usually mild. A 3-hour time difference might cause you to feel slightly off for 1-2 days (waking up too early or feeling sleepy too early). Most people adjust within 2 days without any intervention.
If it's daytime at your destination, try to stay awake until at least 8-9 PM local time. A short nap (20 minutes max) is OK if you're desperate, but longer naps will delay your adjustment. If you arrive at night, go to bed at the local bedtime even if you're not tired. Use melatonin and blackout curtains to help.
Yes. Eastward travel (advancing your clock) is harder than westward travel (delaying your clock) for most people. Flying from New York to London (5 time zones east) is harder to adjust to than flying from London to New York (5 time zones west). Plan your intervention strategy accordingly.