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Hey, shortwavers, the holidays are approaching, and that often means lots of travel.

Across the country or internationally, which often just, like, knocks me out.

But that exhaustion can happen even if you're not traveling.

I stayed in exactly my house,

but I had a baby, which means that my schedule got topsy-turvy, turned all the way around,

and it felt like I had jet lag, even though I didn't go anywhere. That's Jade Wu, a behavioral

sleep medicine psychologist and the author of the book, Hello Sleep.

And I called her up because I, and I suspect many of you shortwavers, are about to put our

bodies through that exhaustion again. In a few weeks, my partner and I are going to Australia,

New Zealand, which has basically the opposite day and night cycle from here in D.C.

So we're going to be

extremely jet-legged. Jet-leg is when your body very quickly changes time zones so that your

internal body clock becomes mismatched with the outside environment. Our bodies have billions of

clocks. They're in our cells, our organs, our brains, and they make up our circadian rhythm.

The circadian system should work like a symphony that plays in sync together and on time.

If all our clocks run as they should and together in sync,

then our circadian rhythms are doing great.

And so that's why when we get jet lagged or, you know, have a baby and your whole schedule

...