Jet lag – just the name of it can make frequent flyers groan. If you are hopping between time zones for work or leisure, you have probably felt the dreaded exhaustion, mood swings, and overall brain fog that comes with it.
What is Jet Lag and Why Does It Happen?
Jet lag is a temporary sleep disorder that occurs when your body’s internal clock — also known as your circadian rhythm – becomes misaligned with the local time at your travel destination. This internal clock regulates your sleep-wake cycle, energy levels, digestion, and even mood based on a 24-hour rhythm tied to natural light and dark.
When you travel quickly across multiple time zones, your body doesn’t immediately adjust to the new schedule. For example, you might land in London in the morning, but your body still thinks it’s nighttime in Sydney. This mismatch can leave you feeling groggy during the day, wide awake at night, and generally out of sync which are classic signs of jet lag.
The more time zones you cross, especially heading east, the harder it is for your body to catch up – which is why jet lag tends to affect long-haul travelers the most.
How Can You Help Your Body Adjust?
One of the most effective ways to help your body adapt to a new time zone is by supporting your circadian rhythm – and that’s where melatonin comes in.
What Exactly Is Melatonin?
Melatonin is a hormone your body produces naturally, usually in response to darkness. It’s your brain’s way of saying, “It’s time to sleep.” Levels typically rise in the evening and drop off by morning to help regulate your sleep-wake cycle.
When you’re travelling across time zones and your body clock is out of sync, taking a small dose of melatonin at the new local bedtime can gently prompt your body to adjust. But timing matters – take it too early or too late, and it could throw your rhythm off even more. If you’re unsure when to take it, it’s a good idea to check with a healthcare professional.
Other Jet Lag Tips
Melatonin’s great, but it’s not the whole story. To really beat jet lag, you have to tackle it from multiple angles.
- Adjust your schedule early: If possible, start shifting your sleep and wake times a few days before you travel to better match your destination’s time zone. Even an hour or two can make a difference.
- Get strategic sunlight exposure: Natural light is a powerful cue for resetting your circadian rhythm. Spend time outdoors during the morning if you need to advance your body clock, or in the evening if you need to delay it.
- Stay hydrated: Dry airplane cabins can dehydrate you quickly, making you feel even worse when you land. Drink plenty of water during and after your flight.
- Limit caffeine and alcohol: While that coffee or cocktail may be tempting, both can mess with your sleep and make it harder for your body to adjust. Stick to water or herbal teas instead.
Sleep: The Foundation for Faster Recovery
Sleep is one of the most critical pieces in the jet lag puzzle. Without good sleep, your body struggles to heal, focus, and reset itself to the new environment.
- Create a restful sleep environment: Use blackout curtains and eye masks to block out distractions in your hotel room.
- Stay consistent with sleep times: Even if you feel tired at odd hours, try to stick to the local bedtime. Short naps (20–30 minutes) are fine in the early afternoon but avoid long naps late in the day as they can make adjusting harder.
- Resist the urge to oversleep: Sleeping much longer than usual might seem like a good idea after a long flight, but it can further confuse your body clock. Aim for your normal amount of sleep (7–9 hours for most adults).
Final Thoughts
There’s no magic bullet for jet lag, but there are proven strategies that can make it much more manageable – especially for frequent travellers. Building a toolkit that includes melatonin (used wisely), smart exposure to sunlight, good hydration, and a strong focus on sleep hygiene can help you stay sharp, energised, and ready to take on your destination.
Every traveller is different, so it may take some experimenting to find what works best for you. But with a little planning and the right techniques, you can make jet lag less of a dreaded side effect and more of a minor bump on your journey.
Reference:
- Better Health: Jet lag. Available at: https://www.betterhealth.vic.gov.au/health/healthyliving/jet-lag (Accessed: 29 April 2025)
- Healthline (2024): 8 Tips to Help Get Over Jet Lag. Available at: https://www.healthline.com/health/healthy-sleep/how-to-get-over-jet-lag (Accessed: 29 April 2025)