What is "jet lag"

also jetlag, 1966, from jet (n.2) + lag (n.). Also known in early days as time zone syndrome.

n. A physical condition caused by crossing time zones during flight; often the result of disruption to the circadian rhythms of the body.

n. fatigue and sleep disturbance resulting from disruption of the body's normal circadian rhythm as a result of jet travel

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.

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 jet lag. Travel by propeller-driven aircraft, by ship or by train were slower and of more limited distance than jet flights, and thus did not contribute widely to the problem.

Jet Lag is a 2002 film starring Juliette Binoche and Jean Reno. It is the second film directed by Danièle Thompson, after the 1999 release Season's Beatings.

Jet lag is a physiological syndrome.

Jet Lag may also refer to:

• Jet Lag (film), a 2002 film starring Juliette Binoche and Jean Reno
• Jet Lag (Premiata Forneria Marconi album), 1977
• Jet Lag (Josiah Wolf album), 2010
• "Jet Lag" (Simple Plan song)", a 2011 song by Simple Plan
• "Jet Lag", a 1974 song by Nazareth, from the album Rampant
• "Jet Lag", a 2004 song by Joss Stone, from the album Mind Body & Soul
• "Jet Lag", a 2008 song by Frank Turner, from the album Love Ire & Song
• "Jet Lag", a 2002 song by Brendan Benson, from the album Lapalco
• "Jetlag", a series of parody travel guide by Working Dog Productions
• Jetlag (band), American band

Jet Lag is the fifth album of the Italian progressive rock band Premiata Forneria Marconi, released in 1977 by Asylum Records in the US and Manticore Records in Europe. This album incorporates the use of fretless bass in the sound and has a jazzier feel in comparison to the band's previous efforts. Four of the five tracks with vocals are sung in English. "Cerco la Lingua" ("I Look for the Language") is the only one sung in Italian. The album is also the first one not featuring founding member Mauro Pagani, who left the band the year before to pursue solo projects.

"Jet Lag" a song performed by Canadian band Simple Plan. It was released on April 25, 2011 as the second single from their fourth studio album Get Your Heart On!.

Coeur de Pirate co-wrote the song Jet Lag with Simple Plan and a demo was recorded with her voice.

Four official versions exist, one featuring British singer Natasha Bedingfield providing guest vocals in English, another one featuring French-Canadian singer Marie-Mai, providing guest vocals in French; a version in Chinese featuring Chinese pop singer Kelly Cha, and an Indonesian version featuring Kotak lead vocalist Tantri.

Jet Lag is the first studio album by American multi-instrumentalist Josiah Wolf. It was released on Anticon in 2010.

Jet Lag is the fourth studio album by solo artist Milosh. It was released in November 2013 under Deadly Records, and produced by himself and his wife Alexa Nikolas.