Jet lag is a combination of fatigue and other symptoms caused by travelling abruptly across different time zones. Travelling to a different time zone disrupts the circadian rhythm. And it can take many days to readjust to the new time zone. In fact, NASA estimates that you'll need one day for every one-hour time zone crossed to get back to your normal rhythm and energy levels. So a five hour time difference means that you'll need five days to get back to normal. There is no cure for jet lag, but its effects ( memory lapses, irritability, digestive upsets,...) can be reduced with careful planning.
Flying east or west makes a difference. Your 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. Travelling eastwards, however, runs in direct opposition to the body clock.
There is no evidence that popular strategies, such as fasting or eating complicated diets, have any effect. Suggestions to reduce the impact of jet lag while travelling include avoiding alcohol and caffeinated drinks, eating small meals frequently, choosing lighter foods like fruit and vegetables or wearing loose, comfortable clothing.
Some travellers use alcohol to help them get to sleep, but this actually disrupts the normal sleep cycles and can prolong jet lag. The impact of alcohol on the body is 2-3 times more potent when you're flying.
1. On lengthy journeys it is unlikely that any measures will eliminate jet lag
2. A copious meal before taking a flight is likely to minimize the effect of jet lag.
3. If you fly from Europe to America the effect of Jet Lag is less aggressive than if you fly from America to Europe
4. One glass of wine in flight has the effect of 2-3 glasses on the ground.
In English, we can express future situations with different tenses, but there are 2 which are more commonly used than the rest:
Oh, what a mess! I'll clean it right now (spontaneous decisions)
I promise I will book the flights tomorrow (promises)
The conservatives will win the general elections again (predictions
Next summer I am going to visit my family in Belgium (plans)
I think it is going to rain all week (predictions)