You’ve heard of REM sleep but what about deep sleep? Experts share why it’s important and how to make sure you’re getting enough of it.

Given the growing popularity of sleep trackers, it's worth asking whether a sensor on your wrist or finger can really tell ...

The end of daylight saving time meant we all turned our clocks forward an hour. And with one less hour of sleep, the day was also greeted with the fervent hitting of snooze buttons and coffee cups ...

I'm a certified sleep science coach who has tested over 50 mattresses. Traveling, whether for business or pleasure, is an important part of on-the-go lifestyles, but it can take its toll on your ...

Many of us have a fraught relationship with sleep. We delay bedtime for precious alone time, we scroll on our phones in bed, we sacrifice weeknight sleep only to catch marathon Zs on the weekend.

A series of random questions answered by Harvard experts. Elizabeth Klerman is a sleep researcher and a professor of neurology. It varies by person. Generally, it’s how much you get if you don’t have ...

Some tips to help fall asleep in hot weather include keeping windows closed in the day and open at night, keeping hydrated, and having a cold shower before bed. A 2024 systematic review found that ...

The middle of the night used to be my special time. I’d use it to cram for a test, read a mystery, or play Candy Crush—with no one around. As I got older, those nighttime hours became time to answer ...