Man in transit: Biochemical and physiological changes during intercontinental flights.

Fifteen members of the passengers and crew of a plane flying from Buenos Aires to London have been studied, before, during, and after the 20-hour flight. Even allowing for circadian variation, there were clear rises in the urinary excretion of noradrenaline in the first part of the flight, and of both noradrenaline and adrenaline in the 2 days afterwards.