That overwhelming feeling of being exhausted when you’ve been on a long-haul flight is due to your body clock getting out of sync, because you’ve travelled across several time zones.
Jet lag appears to be worse when you go from west to east.
Some ways of avoiding jet lag, or at least reducing the effects, include:
• Changing your watch to the time of the place you’re going to as soon as you get on the plane, and trying to sleep when it is night-time there.
• Drinking plenty of fluids on the plane. If you get dehydrated, it can make it harder for your body to adjust to the changes in time.
• Trying to get into the new time zone as soon as you arrive. If you get there in the morning, stay up until the evening.
• Going for a walk in the daylight when you arrive at your destination. This helps to show your body clock it is daytime, and not time for sleep.
• If you really do need a nap, set an alarm or get someone to wake you up after two hours. If you sleep for longer, you could confuse your body clock and end up awake in the middle of the night.
• Avoiding alcohol or caffeine while you’re flying and when you get to your destination, as they can upset both you and your body clock.