No sooner landed than your body is still hours behind: jet lag is one of the most annoying companions of long-distance travel. Daytime fatigue, lying awake at night, concentration problems, and an upset stomach – all of this happens because your internal clock is lagging behind local time. The good news: with the right strategy, jet lag can be significantly alleviated.
The short answer: Jet lag occurs when your internal clock no longer matches the local time at your destination. The best way to prevent it is to slightly adjust your rhythm before your trip, consistently align with daylight and local time at your destination, and use naps and caffeine strategically. Your body needs about one day to adjust per time zone.
- Travel to the east is usually more strenuous than to the west because the day is "shortened."
- Light is the most effective way to reset your internal clock at your destination.
- Set your clock to the destination time already on the plane and act accordingly.
- A comfortable, cool sleeping environment helps you get back to deep sleep quickly at your destination.
Why does jet lag occur at all?
Your internal clock is set to your home time and can only be shifted slowly – about one to two hours per day. If you cross several time zones on a flight, your body will lag behind the new local time. Melatonin secretion, body temperature, and hunger will continue to follow the old rhythm. The result is typical jet lag with fatigue, sleep disturbances, and digestive problems.
How severe the jet lag is depends on the number of time zones and the direction of travel. Rule of thumb: Flying west (day gets longer) is easier for most people because the internal clock prefers to delay rather than advance.
Before the trip: clever preparation
Jet lag doesn't start at your destination. Those who prepare will arrive more easily:
- Adjust rhythm: Shift your sleep and wake-up times a few days before departure by 30 to 60 minutes towards the destination time.
- Start well-rested: Don't travel with a sleep deficit – pay attention to good sleep hygiene beforehand.
- Choose flights wisely: An arrival time in the evening makes it easier to fall asleep immediately at local time.
During the flight: switch to destination time
As soon as you're on the plane, set your clock to the time at your destination. From now on, you'll align your eating, sleeping, and waking with it. Drink enough water, avoid too much alcohol – it impairs sleep quality, as our article on alcohol and sleep quality shows. If it's night at your destination, try to sleep; a sleep mask and earplugs will help.
Jet lag by travel direction
| Travel Direction | Effect on the day | Strategy | Difficulty |
|---|---|---|---|
| Eastward (e.g., Europe → Asia) | Day gets shorter | Sleep earlier, seek morning light | Usually harder |
| Westward (e.g., Europe → USA) | Day gets longer | Stay awake longer, use evening light | Usually easier |
| North-South (same time zone) | Hardly any shift | Only compensate for travel fatigue | Low |
At your destination: quickly find a new rhythm
Now it's about consistent behavior. These points accelerate adaptation:
- Dose daylight: After eastward travel, seek light in the morning; after westward travel, rather use the evening light. Light at the wrong time can prolong jet lag.
- Live local time: Eat and sleep according to local time, even if it's difficult.
- Limit naps: If necessary, only 20 to 30 minutes in the early afternoon – otherwise, night sleep will suffer.
- Caffeine strategically: Yes in the morning, avoid in the afternoon – more in Caffeine and Sleep.
- Exercise: A walk in daylight has a double effect – light plus activity.
If you sleep well at your destination, your body will get back into rhythm faster. That's why it's worth paying attention to a comfortable sleeping environment and the ideal sleeping temperature even when you're on the go. Once you're home, your familiar, comfortable bed will help you quickly shake off any lingering jet lag.
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Frequently Asked Questions about Jet Lag
How long does jet lag last?
As a rule of thumb, it takes about one day of adjustment per time zone crossed. With a six-hour time difference, it can take around six days until you are fully settled in. Westward travel is often a bit quicker.
Does melatonin help with jet lag?
Melatonin can aid adjustment if taken at the right time. However, the timing of light and consistent alignment with the local time rhythm are more important. If you have questions about taking it, speak to a specialist doctor or pharmacist.
Should I sleep immediately upon arrival?
That depends on the local time. If you arrive in the evening, sleeping is sensible. If you land in the morning, stay awake until evening and use daylight to help your rhythm adjust faster.
How do I avoid jet lag on short trips?
For stays of only one to two days, it may be beneficial to try and stay on your home rhythm as much as possible and schedule appointments accordingly. This saves you the double adjustment.
This article is for general information purposes only and does not replace medical advice.
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