Sleep

What you eat during the day can affect how well you sleep at night. Sleep researchers explain the impact of diet, caffeine and alcohol on sleep health, and share a list of sleep-supporting foods.

A new study conducted by UT Health San Antonio showed that sleeping nine hours or more per night is associated with worsening cognitive performance, most especially for those with depression.

In order to better understand her circadian rhythm, science journalist Lynne Peeples conducted an experiment in which lived for 10 days in a bunker, with no exposure to sunlight or clocks.

More than 400 elderly people were studied over three years for signs of poor sleep, along with declining motor and walking skills, that can contribute to dementia.

A study found that the Pentagon is doing a lot to improve troops' sleep habits, but more needs to be done.

Sleep experts say watching TV and using devices within an hour of bedtime can disrupt sleep. The study concludes this may not be true of everyone.

Feeling groggy these days? NPR's Life Kit has science-based strategies to help you sleep better, deeper and longer.

Burnt out much? A study links working late, or variable shifts with health problems later in life. Maybe it's time to quit hustle culture for good.

Scientists think the timing of exercise might matter for performance — and for your overall health. Here's what to know about their latest findings.

Should you stress about getting eight hours of sleep a night? Nope! Some experts say skip the worry and focus on keeping a consistent sleep schedule instead.