Jet lag

Jet lag, medically referred to as desynchronosis, is a physiological condition which results from alterations to the body's circadian rhythms; it is classified as one of the circadian rhythm sleep disorders. Jet lag results from rapid long-distance transmeridian (east–west or west–east) travel, as on a jet plane.

The condition of jet lag may last several days, and a recovery rate of one day per time zone crossed is a fair guideline.