A dysfunction may be present in the internal coupling mechanisms of biologic pacemakers (eg, the coupling of the sleep-wake cycle with the temperature cycle). To avoid jet lag, it is important to adapt yourself to the routine of your destination's time zone as soon as possible.
Jet lag - This is a transient condition that has a good prognosis. Patients should be advised of risks secondary to sleepiness and have follow-ups after treatment to determine if risk factors have been satisfactorily addressed.
Travelers can minimize jet lag by doing the following before travel: Exercise, eat a healthful diet, and get plenty of rest. Begin to reset the body clock by shifting the timing of sleep to 1–2 hours later for a few days before traveling westward and shifting the timing of sleep to 1–2 hours earlier for a few days before traveling eastward. It can also be helpful to shift mealtimes to hours that coincide with these changes. Seek exposure to bright light in the evening if traveling westward, in the morning if traveling eastward.