Jet lag hits harder on the way home than most people expect. Your body’s internal clock shifts at roughly one hour per day after eastward travel and about two hours per day after westward travel, so a trip across six time zones east could leave you out of sync for nearly a week. The good news: you can cut that recovery time significantly by stacking a few well-timed strategies together.
Why Direction Matters for Recovery
Your internal clock naturally runs slightly longer than 24 hours, which makes it easier to stay up late than to go to bed early. That’s why flying west (lengthening your day) is easier to bounce back from than flying east (shortening it). Computational models of circadian adjustment confirm this asymmetry: delaying your clock takes roughly two days, while advancing it takes closer to three for the same number of time zones.
This has a practical implication for your first days home. If you flew east to get home, you’ll feel wide awake late at night and groggy in the morning. If you flew west, you’ll crash early in the evening and wake up before dawn. Knowing which pattern to expect helps you target the right fix.
Use Light as Your Primary Reset Tool
Light is the strongest signal your brain uses to calibrate its clock, and getting the timing right matters more than getting a large dose. The goal is simple: expose yourself to bright light during the hours you want your brain to recognize as “daytime,” and keep things dim during the hours you want it to treat as night.
If you traveled east to get home, your clock is stuck in an earlier time zone. You need to push it forward (phase advance), which means seeking bright light in the morning as early as you can tolerate it. Go outside within 30 minutes of waking, even if you feel terrible. Sustained exposure works better than a quick burst. At the same time, avoid bright light in the late evening, including screens. Wear blue-light-blocking glasses or dim your environment after sunset for the first few nights.
If you traveled west, your clock is ahead of local time. You need to push it back (phase delay), which means avoiding bright morning light for the first couple of days and instead getting outdoor light exposure in the late afternoon and early evening. This is more intuitive since you’ll naturally want to sleep in anyway.
Time Your Meals to Local Schedule
Your brain isn’t the only thing with a clock. Your liver, gut, kidneys, and other organs all run on their own circadian rhythms, and they sync to meal times rather than light. Feeding schedules entrain clocks in multiple organs and brain regions, using signals from absorbed nutrients and metabolic hormones to set the pace.
The practical takeaway: eat breakfast, lunch, and dinner at normal local times from your first day home, even if you’re not hungry. Skipping breakfast because you slept until noon, or eating a full meal at 3 a.m. because your stomach thinks it’s lunchtime, keeps your peripheral clocks locked to the old time zone. A small meal at the right time does more than a large meal at the wrong one.
Melatonin: Dose and Timing
Melatonin is one of the few supplements with strong evidence for jet lag recovery, but the timing matters far more than the dose. Doses between 0.5 and 5 milligrams are similarly effective at shifting your clock. Higher doses (above 5 mg) don’t work better and can leave excess melatonin circulating at the wrong time of day, which actually slows your adjustment.
Start with 2 or 3 mg. Take it at bedtime after darkness has fallen on your first night home, then continue at the same local bedtime for three to five nights. If you flew east, taking it about 90 minutes before your target bedtime can help support your body’s natural melatonin rise and nudge your clock forward. The critical mistake to avoid: taking melatonin earlier in the day. A daytime dose causes drowsiness and delays your adaptation to local time.
Nap Smart, Not Long
You will be sleepy during the day. Fighting it completely is miserable and unnecessary, but long naps are a trap. They reduce your sleep pressure at night, making it even harder to fall asleep at the right time, and they can lock you into a cycle of poor nighttime sleep and daytime crashing.
Keep naps to 15 to 20 minutes. Set an alarm. Nap earlier in the day rather than later, ideally before 2 p.m., so you don’t erode your ability to fall asleep that evening. If you’re so exhausted that a 20-minute nap feels impossible to wake from, that’s a sign you need an earlier bedtime that night, not a longer nap.
Morning Exercise Shifts Your Clock Forward
Exercise acts as a secondary time signal for your circadian system, and the direction of the shift depends on when you work out. Morning exercise produces a meaningful phase advance, shifting the clock earlier by about 37 minutes on average. Evening exercise, by contrast, has almost no shifting effect for most people, and for early risers it can actually push the clock in the wrong direction.
If you flew east and need to advance your clock, morning exercise is your ally. Even a 30-minute walk or light jog outdoors combines two signals at once: physical activity and bright light. If you flew west and need to delay your clock, evening exercise may help if you’re naturally a night owl, but it’s less reliable than light exposure alone. For most people returning from westward travel, a late-afternoon workout paired with outdoor light is a reasonable strategy.
Manage Caffeine Carefully
Caffeine is tempting when you’re dragging through the afternoon, and it’s genuinely useful for maintaining alertness during the adjustment period. But evening caffeine prolongs the time it takes to fall asleep, reduces total sleep duration, and cuts into deep sleep, which is exactly the restorative stage your body needs most right now.
The half-life of caffeine is roughly five to six hours, meaning half the caffeine from a 3 p.m. coffee is still in your system at 9 p.m. Cut off all caffeine by early afternoon. Use it strategically in the morning to push through grogginess, then switch to water or decaf. This is especially important during the first three days home, when your sleep architecture is already compromised.
Optimize Your Bedroom for Sleep
When your internal clock is fighting your desired bedtime, small environmental factors that you’d normally ignore can become the difference between falling asleep and lying awake for hours. Room temperature is one of the most underrated. Your body needs to drop its core temperature slightly to initiate sleep, and a room between 19 and 21°C (66 to 70°F) supports this process. A room that’s too warm keeps your body in a state that resists sleep onset.
Block out all light, including standby LEDs and streetlight leaking around curtains. Your circadian system is sensitive to even low-level light exposure during the biological night. Use blackout curtains or a sleep mask. Keep your phone outside the bedroom or face-down with notifications silenced. The goal is to remove every possible signal that could tell your confused brain it’s time to be awake.
A Day-by-Day Framework
Putting this together, your first three days home might look like this:
Day 1: Wake at your normal local time regardless of how you slept. Get outside into bright light immediately. Eat breakfast, lunch, and dinner at local times. Exercise in the morning if possible. Take 2 to 3 mg of melatonin at your target bedtime. Keep the bedroom cool and dark.
Days 2 to 3: Continue the same light, meal, and melatonin pattern. Allow one short nap (under 20 minutes) if needed, before 2 p.m. Cut caffeine by early afternoon. You should notice your sleep consolidating and your energy returning to a more normal rhythm.
Days 4 to 7: Most westward travelers will feel close to normal by day 4. Eastward travelers crossing five or more time zones may still feel slightly off. Continue morning light exposure and consistent meal timing. You can stop the melatonin once you’re falling asleep within 20 to 30 minutes at your target bedtime.
The single most important thing is consistency. Every signal you send your body, whether it’s light, food, activity, or melatonin, should point to the same local schedule. Mixed signals (sleeping in one day, staying up late the next) are what stretch a three-day recovery into a week-long slog.