Jet lag has long been treated as an unavoidable tax on global travel, a foggy penalty paid in lost sleep, dulled concentration, and sluggish days after a long-haul flight. Now researchers say a new ...

Israeli scientists have developed an innovative method to track the human body’s circadian rhythms, finding in a new peer-reviewed study that female sex hormones have a dramatic effect on the setting ...

Plan on a glorious extra hour of sleep as most of America “falls back” into standard time. But make sure to get outside for some morning sun, too — it’ll help your body clock reset faster. Daylight ...

(CNN) — Early risers may have inherited genetic variants from Neanderthals that increased their odds of being morning rather than evening people, new research has found. While the human body clock is ...

If you're an early riser, go outside early in the morning to get some light. Light helps you stay more alert during the day and reduces your body's production of melatonin, which causes drowsiness.

Plan on a glorious extra hour of sleep as most of America “falls back” into standard time. But make sure to get outside for some morning sun, too — it’ll help your body clock reset faster. Daylight ...

Plan on a glorious extra hour of sleep as most of America “falls back” into standard time. But make sure to get outside for some morning sun, too — it’ll help your body clock reset faster. Daylight ...

Plan on a glorious extra hour of sleep as most of America “falls back” into standard time. But make sure to get outside for some morning sun, too — it’ll help your body clock reset faster. Daylight ...