Long flights play tricks with your internal clock in ways that make you hazy, tired, and out of sync with the world. Your body believes it’s 3 AM when the sun is hot, or you’re awake at midnight, ...

Americans will get a glorious extra hour of sleep as most of the United States “falls back” into standard time. But you should make sure to get outside for some morning sun, too — it’ll help your body ...

About 15 million Americans clock in when the rest of the country is winding down, and the toll on their bodies is steeper ...