Start of content

A flight attendant has a headachePHOTO : Getty Images / izusek

Despite all their travels, aircraft pilots and crew members would not be protected once morest jet lag. Columnist Charles Prémont explains the effect of changing light on our internal clock, also called the circadian cycle.

He points out, however, that a very small proportion of the population feels little or no effects.

Charles Prémont explains why jet lag is a recent problem in history, and why it only occurs in the east-west axis.