Jet lag lasts anywhere from a few days to a few weeks. View Source . In general, symptoms persist for 1-1.5 days per time zone crossed, but the duration of symptoms varies depending on the person and their trip details.
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A jet lag rule of thumb says it normally takes one day per time zone to get back to “normal” (flying west to east). That means, after a nine-hour time change on a flight from the US west coast to Germany, you'll need nine days before your body fully adjusts to Central European Time.
Sleep Foundation notes that jet lag happens when we travel across three or more time zones. And, there's bad news for anyone traveling from the U.S. to Europe: jet lag is worse when you travel east than it is when you travel west. Why is this?
Jet lag symptoms usually occur within a day or two after traveling across at least two time zones. Symptoms are likely to be worse or last longer the farther you travel. This is especially true if you fly east. It usually takes about a day to recover for each time zone crossed.
So, for that New York to London flight we mentioned earlier, you'd be crossing five time zones, so it could take you about five days to adjust. However, research in rodents suggests the liver, lungs, and muscles can take nearly six times as long as the SCN to adjust to jet lag.
Most people find that jet lag is worse when traveling east than it is when traveling west. View Source . Jet lag differs based on the direction of travel because it's generally easier to delay your internal clock than advance it. Jet lag does not occur on north-south flights that do not cross multiple time zones.
Limit naps in the days following your arrival.If you need it, taking a short nap can help you stay awake during the day. But napping for more than 30 minutes can keep you from falling asleep at night. Try to stay awake until your normal bedtime and get up on time the next day.
Common ways pilots avoid jetlag is staying hydrated, good rest, avoiding caffeine and alcohol, exercising, or sleeping on the airplane. For long-haul flights airlines use multiple pilots for the flight to allow each pilot to get some rest. The more time zones that are crossed, the worse the jet lag.
Don't Sleep During the Flight – or DoSleep on the plane only if it is the normal sleep time for your destination. (A red-eye flight headed eastward is a typical example.) Some people have difficulty sleeping on a plane at all, but it's a good idea under certain conditions.
One of the best ways to minimize jet lag is to try and sleep during the flight. Using earplugs, eye masks, or noise-cancellation headphones helps to block out light and noise.
Flying east or west makes a difference to jet lagYour circadian rhythm (body clock) is less confused if you travel westward. This is because travelling west 'prolongs' the body clock's experience of its normal day-night cycle (the normal tendency of the body clock in most of us is slightly longer than 24 hours).
Adjustment to a new time zone is harder when traveling east than traveling west. This is because you “lose” time and you end up trying to fall asleep when your body is actually waking up.