What is Jet Lag?

A Jet Plane Passes in Front of the Full Moon
Photographic Poster Print

Jet lag results from passing through a number of different timezones when travelling. As a result, the body's internal clock (circadian rhythm) becomes out of synch with the actual day-night cycle. In simple terms, your body thinks it's 2AM in the morning whilst the clock says 18:00!

Some reports say that over 90% of long-haul air travellers suffer from jetlag. The problems often seem to be worse when travelling "forwards" - for example from the USA to the UK.

Symptoms of Jet Lag

The effects of jet lag are worse the more time zones you travel through. It's important to remember that it is time zones that matter, not distance. You can fly any number of miles North/South without suffering from jet lag.

Jet lag symptoms are usually worse the more rigid your usual rhythm. Those least affected are babies and students!

Jetlag symptoms will wear off by themselves as the body readjusts its internal rhythm. Depending on the individual this can happen as quickly as in a day or take a week or even longer.

Preventing and Beating Jet Lag

Curing Jet Lag Symptoms

One tip is to reset your watch to your destination timezone as soon as you board the plane. Then stick with that time frame. If the flight offers a meal and your watch now says it's 2AM - turn the meal down, put on your eyeshade and try to sleep. This will give you a headstart when you arrive at your destination.

Continue this adjustment when you arrive. Resist the temptation to sleep early evening because you're tired - wait until the clock shows your usual bedtime.

There are many over-the-counter preparations available to assist in resetting your sleep cycle. These range from herbal and homeopathic remedies through melatonin to prescription pills. Always discuss read and follow the instructions on how to use these and if in doubt discuss them with your doctor.

Another option is to use a "body clock" or sunrise alarm clock. These work by slowly dimming the light when you go to sleep and then slowly raising it before alarm time to simulate natural sunset and sunrise even in winter. Bodyclocks can also be effective in treatment of mild seasonal affective disorder. The author of this page uses a bodyclock all the time.

Some people also report success in beating jet lag through diet. This relies on planning - you need to begin your new eating habits several days before the flight.

• Who Should Use a Jet Lag Diet?