Why is eastward jetlag worse?

Flying east or west makes a difference to jet lag 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). Travelling eastwards, however, runs in direct opposition to the body clock.



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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.

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Plane travel makes jet lag worse because your body moves much faster than your brain and circadian rhythms can process the time change. Other aspects of travel can also contribute to jet lag and may make symptoms worse: Long periods of sitting on a plane. Lack of oxygen and decreased air pressure in the airplane cabin.

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According to the NHS, crossing one or two time zones doesn't usually cause jet lag. Three to six time zones results in mild jet lag, and crossing seven to 12, to destinations like Mexico or Bali, will result in the strongest effect.

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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.

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It is widely acknowledged that jet lag is worse when travelling east, but this has nothing to do with the direction of Earth's rotation. Like many creatures, humans have a circadian rhythm that follows a 24-hour period and is kept in sync by the eyes' response to natural light levels over the day.

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Duration of Jet Lag: How Long It Lasts Researchers have found that, on average, it takes people about one day to adjust for each 1 to 1.5 hours of time change. So if you fly from the East Coast to the West Coast, which is a three-hour time difference, you should be over your jet lag in two to three days.

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If you have the choice, try to book a flight that leaves between 8 am and noon and arrives between 6 pm and 10 pm. According to this book, flights that leave late at night (10 pm-1 am) and arrive in the morning (8 am to noon) give a much bigger risk for jet lag.

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Adjust your sleep-wake schedule: Getting on the sleep-wake schedule at your destination quickly may help with jet lag symptoms. Focus on getting quality sleep: Sleeping on the plane, if you can, may help your body adjust faster to a new time zone.

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In addition to shift work, the two types of employees who work on aircraft, pilots (also known as flight deck or flight crew) and cabin crew (also commonly known as flight attendants), regularly experience jet lag. This further increases their risk of adverse health outcomes, particularly fatigue and sleepiness.

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Japan to the US can be ten time zones so most people will adjust in 2 - 4 days. What are the effects of jet lag on energy levels for travelers? What are some tips for getting over jet lag when flying long distances?

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It is as though you are seeing the Sun as it would be at an earlier time in the day. We can make this more precise by saying that as you travel East you will gain time, and as you travel west you will lose time. The exact amount depends on how many Time Zones you travel through.

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Scientifically, eastward flights are harder than westward flights because of the time lost. West, it's harder to adjust to the time change going east. Flying against the sun is always harder than flying with the sun.

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One study claims it only takes two-thirds of a day per zone, or about six days to adjust to a nine-hour time difference (west to east). For westward flights it is somewhat easier to adjust to the time-zone shift, only requiring about half a day per time zone.

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Melatonin is remarkably effective in preventing or reducing jet lag, and occasional short-term use appears to be safe. It should be recommended to adult travellers flying across five or more time zones, particularly in an easterly direction, and especially if they have experienced jet lag on previous journeys.

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