A Journey Through Time and Sleep

Abstract

Distant travels can affect sleep in many ways. Jet lag disorder is a specific circadian sleep disorder characterized by misalignment of the inherent circadian rhythm and the external environment caused by rapid travel across multiple time zones. Travel fatigue due to repetitive long-distance travels may affect a traveler’s daytime function and mood. Airplane travel and high-altitude locations may contribute to travel-related fatigue. The sleep environment—including the comfort of the bed, the ambient light, sounds, temperature, and air quality—can all interfere with optimal sleep. Changes in daytime eating, drinking, and activity levels can also impose stresses on sleep. Countermeasures for each of these conditions can help ensure a more restful journey. Duration of travel, distance of journey, time for preparation, and time for post-travel recovery will all influence the recommendations to mitigate jet lag disorder symptoms.