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Written by Drew Dawson on August 21, 2020

Travelling these holidays? Follow tips the Socceroos use to conquer jet lag

Travel

Long-haul flights over several time zones present two main challenges:

  1. travel fatigue – the effects of sleep loss, restricted movement and dehydration associated with spending many hours on a plane, and
  2. jetlag – the effects of the mismatch between your body clock and the time in your new location.

However, there are ways to minimise disruption to your sleep patterns and body clock when you travel.

The guidelines shown below are similar to those recently used by the Socceroos to help them overcome the jet lag associated with back-to-back games in Honduras and Australia. The result is that they’ll be heading to next year’s World Cup.

Research suggests that there are several things you can do to facilitate adjustment to time zone changes. These include:

  • exposure to, and avoidance of, light at certain times
  • intentional scheduling of sleep and wakefulness
  • use of drugs that can alter sleepiness and/or the timing of the body clock
  • timing and type of food eaten.

As detailed below, we have prepared schedules for exposure to sunlight and low light to follow for 4-5 days after arriving in your new location.

What to do on the flight

The main difficulties with long-haul flights are dehydration, physical discomfort, and sleep loss. To address this, you should:

  • minimise your intake of diuretics, or fluids that increase urine production, such as alcohol, coffee, tea and caffeinated soft drinks
  • drink water regularly, at least 100ml per hour
  • stretch regularly when seated
  • take a walk every hour when awake.

It can be difficult to get good sleep on a plane. The best strategy is to target sleep during night time in your departure city, and stay awake at other times.

To help sleep aboard the plane, recline your seat, keep your head stable with the headrest, use eye masks and ear plugs if required, and ask flight attendants not to disturb you.

Try not to miss sleep due to playing computer games or watching movies during your sleep target zones.

Medications and food

Melatonin is produced by your brain during the night to signal that it is time to be asleep, and it can be taken as an effective sleeping tablet in controlled circumstances. However if you don’t get the timing right, it can have unanticipated effects on your body clock.

Sleeping tablets can be effective, but can also impair concentration, coordination and alertness the next day, and issues of tolerance and dependence may arise. However, if required, short half-life non-benzodiazepines are preferred to benzodiazepines as they tend to have less negative impact on waking function the next day. Consult your doctor for advice on how to use these, and for a prescription if you think they are suitable for your needs.

Research shows that diet can also be used to promote sleepiness at night time and alertness during the daytime. These effects of food usually last for 2-4 hours.

To promote sleepiness, eat foods with a high glycemic index (GI), such as white rice, pasta, bread, potatoes, carrots, starchy treats like donuts, and some breakfast cereals.

To promote alertness, eat foods that are high in protein, such as meat, eggs, fish and beans.

Changing your light exposure

Staying inside and going outside at the right times can be hard, as your plans may prevent you from doing this.

If you can’t be outside in the sun, another way to achieve light exposure is to use lighting products that can provide bright light at will.

These products typically use a series of LED (light emitting diode) globes built into the frames of a pair of glasses. This setup delivers bright light directly to the eyes without the need to bother others – it’s what the Socceroos recently used while flying.

Bright light glasses are made by several companies. Another alternative is bright light boxes. These can be useful when the optimum light exposure times occur during the dark in your destination port.

For the reverse situation – that is, aiming to remove light exposure – normal dark sun glasses can be used if you’re outside at a time when ideally you need to be in the dark to adapt. So-called “blue-blocker sunglasses” are another alternative.

Sample adaptation schedule for East-West travel

This example is for travel from Australia to Europe across around eight time zones, but it would work equally well for travel from the United States to Australia. We’ve used a 24-hour clock to indicate times – so for example, 2300 is 11pm, and 0400 is 4am.

We use the term “body clock minimum” to refer to the time of day when it is the easiest to be asleep, and hardest to function effectively if you are awake. For most people who are in bed from 2300–0700h, your body clock minimum occurs at about 0400h.

On the first day in Europe (after a time zone change of 8h West), you have not adapted to the new time zone, so your body clock minimum will be at 2000h local time, which is 0400h in Australia.

You want your body clock minimum to delay – that is, to gradually shift later each day from 2000h to 0400h.

The article was published at Travelling these holidays? Follow tips the Socceroos use to conquer jet lag.

 

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