<Tr> <Th> Synonyms </Th> <Td> Desynchronosis, circadian dysrhythmia </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Neurology </Td> </Tr> <P> Jet lag 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 . 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 . </P> <P> 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 . </P>

How will time be affected as a person travels from the east coast of the us to the west coast