Jet lag is a feeling of tiredness, experienced after flying across time zones. The rapid travel disturbs the normal biorhythm of the body; as a result the body's internal clock is unable to cope with the change.

The symptoms of jet lag include tiredness or fatigue, day-time drowsiness or difficulty in sleep at night, decrease in mental ability, physical energy and memory, irritability, headache and gastrointestinal discomfort.

Drink plenty of water during the flight.

You should try to avoid coffee, soft drinks and alcohol during your flight.

Eat high-protein, low-calorie meals to prevent jet lag.

Schedule to arrive at the destination at the usual bed-time and go to sleep, or sleep on the plane and plan to arrive at the usual waking time. You should get a good night sleep before departure.

Set the watch according to the destination time halfway through the flight, and start thinking in terms of the new time helps prevent jet lag.

Spend more time outdoors at the destination as exposure to bright outdoor light helps in faster adjustment.

A sound and quality sleep also help prevent jet lag. To get quality sleep while flying use ear plugs, eye masks or pillows.