Airplane crew and passengers who frequently fly between several time zones face a number of health problems including disruptions in a woman's menstrual cycle and even short-term psychiatric disturbances, researchers from the UK warn in a report published Thursday in The Lancet.
There seems to be no getting use to long-haul flights, according to researchers who report that flight crews who regularly take long journeys are not protected from the effects of jet lag such as poor and interrupted sleep, mood changes, irritability, stomach problems, and decreased brain power.
Jet lag from crossing several time zones also causes a dip in an athlete's performance, note Jim Waterhouse and two associates from the Research Institute for Sport and Exercise Sciences at Liverpool John Moores University.
Jet lag is worse for older travelers, and its severity increases with the number of time zones crossed. "If the journey say, with flights to the east bringing more jet lag than flights to the west.