CONFUSED Trump Exits Air Force One, Walks Past Limo In Front Of Him, Has To Be Redirected To Limo
Jet lag, medically referred to as
desynchronosis and rarely as
circadian dysrhythmia, is a
physiological condition which results from alterations to the body's
circadian rhythms resulting from rapid long-distance trans-meridian (east–west or west–east) travel on high-speed aircraft. For example, someone travelling from
New York to
London feels as if the time were five hours earlier than local time. Jet lag was previously classified as one of the
circadian rhythm sleep disorders.
[1]
The condition of jet lag may last several days before the traveller is fully adjusted to the new
time zone; a recovery period of one day per time zone crossed is a suggested
guideline. Jet lag is especially an issue for airline pilots, crew, and frequent travellers. Airlines have regulations aimed at combating pilot fatigue caused by jet lag.
The term "jet lag" is used because before the arrival of passenger
jet aircraft, it was uncommon to travel far and fast enough to cause desynchronosis. Travel by propeller-driven aircraft, by ship or by train was slower and of more limited distance than jet flights, and thus did not contribute widely to the problem.
Jet lag - Wikipedia