Jet lag意思英文

"Jet lag" is a term used to describe the feeling of fatigue, disorientation, and sleep disturbances experienced by travelers who cross time zones quickly, typically by air travel. The word "jet" refers to the mode of transportation most commonly associated with long-distance travel, and "lag" suggests a delay or a feeling of being out of sync with the local time.

When people travel from one time zone to another, their internal body clocks, which are synchronized to a 24-hour cycle, can become desynchronized with the local time at their destination. This desynchronization can lead to symptoms such as insomnia, fatigue, daytime sleepiness, difficulty concentrating, and mood changes. The effects of jet lag can vary depending on the number of time zones crossed, the direction of travel (eastbound or westbound), and the individual's susceptibility to the condition.