Explainer: What is jet lag?

Traveling across time zones can disrupt circadian rhythms

By Amanda Leigh Mascarelli, 18:51 PM July 11, 2013

Researchers don’t fully understand how the body’s internal clocks coordinate. But they do know your body will notice when its circadian rhythms are mismatched to the time zone they’re in.

 

“There are a lot of different hormones and other systems in the body that under normal situations are internally synchronized,” says Shawn Youngstedt. He studies circadian rhythms at the University of South Carolina in Columbia. The body clock times when those chemicals are released to orchestrate biological...

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