What is jet lag and why does it happen?
Our body has an internal clock of about 24 hours (the circadian rhythm); this rhythm regulates sleep, wakefulness, digestion and hormone secretion and is largely set by daylight.
When you rapidly cross several time zones, your internal clock stays on the departure point's time while your environment shifts to the destination's time. This mismatch causes jet lag; it is usually harder traveling east (as the day shortens) than west.
Symptoms
Jet lag varies from person to person, but common symptoms are:
- Excessive fatigue during the day and insomnia at night
- Difficulty with attention and concentration
- Digestive irregularities and appetite changes
- General weakness and mood swings
Pre-flight preparation
Reducing jet lag actually starts before the flight. Gradually preparing your body for the new time eases the transition.
- A few days before travel, shift your sleep time toward the destination direction (go to bed and wake earlier if traveling east)
- Rest well before the flight; starting tired worsens jet lag
- If possible, choose flight and arrival times that suit your sleep plan
What you can do in-flight
The steps you take during the flight directly affect how you feel on arrival.
- Set your watch to the destination time at departure and live mentally by it
- If it is night at the destination, try to sleep: a sleep mask blocks light, a travel pillow supports the head, ear plugs reduce noise
- Drink plenty of water; avoid caffeine and alcohol
- Stand up and move from time to time to revive circulation
Adapting to local time on arrival
On arrival, your most powerful tool is daylight. Light is the most effective signal that resets your internal clock.
If you arrive during the day, go outside and get sun exposure and try to stay awake; if you arrive at night, avoid bright light and follow your sleep routine. Sticking to local meal times also speeds adaptation. Limiting daytime naps to 20-30 minutes in the first few days lets you rest without disrupting night sleep.
Helpful travel products
The practical side of managing jet lag comes from having the right rest tools. A sleep mask that blocks light, a travel pillow that supports the head and ear plugs that reduce noise improve your sleep quality both in-flight and on arrival. A travel set offering these three together is the most practical solution for frequent travelers.