Back اضطراب الرحلات الجوية الطويلة Arabic জেট লেগ Assamese Hanyut bakas tarabang BJN জেট ল্যাগ Bengali/Bangla Trastorn d'horari Catalan Pásmová nemoc Czech Jetlag Danish Jetlag German Τζετ λαγκ Greek Horzonozo Esperanto

Jet lag

This article is about the syndrome. For other uses, see Jet lag (disambiguation).

Jet lag
Other namesDesynchronosis, time zone, circadian dysrhythmia
World clocks in Parque do Pasatempo, Betanzos, Galicia, Spain.
World clocks
SpecialtyPsychiatry, neurology, aviation medicine

Jet lag[a] is a temporary physiological condition that occurs when a person's circadian rhythm is out of sync with the time zone they are in, and is a typical result from travelling rapidly across multiple time zones (east–west or west–east). For example, someone travelling from New York to London, i.e. from west to east, feels as if the time were five hours earlier than local time, and someone travelling from London to New York, i.e. from east to west, feels as if the time were five hours later than local time. The phase shift when travelling from east to west is referred to as phase-delay of the circadian cycle, whereas going west to east is phase-advance of the cycle. Most travellers find that it is harder to adjust time zones when travelling east.[1] Jet lag is caused by a misalignment between the internal circadian clock and the external environment, and it has been classified within the category of a circadian rhythm sleep-wake disorder, reflecting its basis in disrupted biological timing rather than general travel fatigue.[2]

The condition may last several days before a traveller becomes fully adjusted to a new time zone; it takes on average one day per hour of time zone change to reach circadian re-entrainment.[3] Jet lag is especially an issue for airline pilots, aircraft crew, and frequent travellers. Airlines have regulations aimed at combating pilot fatigue caused by jet lag.

Jet lag has been the subject of research across multiple fields including chronobiology, sleep medicine, and aviation health. Numerous peer-reviewed studies have examined its underlying mechanisms, health implications, and treatment strategies.[4][5] Research efforts are ongoing, particularly within laboratories focused on circadian biology and sleep disorders, reflecting the condition's relevance to both clinical practice and occupational health.

The term jet lag was created after the arrival of jet aircraft, because prior to that it was uncommon to travel far and fast enough to cause the condition.[6]


Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).

  1. ^ Kalat, James W. (8 February 2018). Biological Psychology (13 ed.). Cengage. p. 261. ISBN 978-1-337-40820-2.
  2. ^ "Highlights of Changes from DSM-IV-TR to DSM-5" (PDF). American Psychiatric Association. 17 May 2013. Archived from the original (PDF) on 17 September 2013. Retrieved 23 May 2013.
  3. ^ Bunn, William B.; Johnson, Clarion E. (2019). "The Business Traveler". Travel Medicine. pp. 287–293. doi:10.1016/B978-0-323-54696-6.00029-X. ISBN 978-0-323-54696-6. Studies suggest that one day per time zone crossed is required for full recovery and eastbound flights may be more difficult. Although multiple treatments have been tried, jet lag is a consistent problem for IBTs.
  4. ^ Richards, Jacob; Gumz, Michelle L. (15 June 2013). "Mechanism of the circadian clock in physiology". American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 304 (12): R1053–1064. doi:10.1152/ajpregu.00066.2013. ISSN 1522-1490. PMC 4073891. PMID 23576606.
  5. ^ "Jet lag disorder - Diagnosis and treatment - Mayo Clinic". www.mayoclinic.org. Retrieved 24 April 2025.
  6. ^ Maksel, Rebecca. "When did the term 'jet lag' come into use?". Smithsonian Magazine. Retrieved 12 April 2024.
From Wikipedia, the free encyclopedia · View on Wikipedia

Developed by Nelliwinne