Let's talk about one of the most confusing terms you’ll see on your fitness tracker—specifically your Apple Watch. Next to REM sleep, which you’ve probably heard of, and “deep” sleep, which feels self ...

How accurate is your smartwatch? Learn how Apple and Samsung smartwatches use motion and HR to track sleep, and why you ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

A month with the Apple Watch, along with its gentle nudges and a doctor’s guidance, helps the writer build a healthy sleep ...

Edit sleep settings from Apple Watch Sleep app or in the Sleep section of the Health app on iPhone. Apple Watch sleep tracking works closely with the Health and Watch apps on your iPhone. Learn how to ...

Find out how to set up a sleep schedule and Sleep Focus in the Health app on iPhone, and how to view your sleep score on ...

Feeling groggy in the morning? Wondering if you're getting enough shut-eye? Your Apple Watch might have the answers you're looking for. With the built-in sleep app, you can easily track your sleep ...

Researchers trace how different sleep stages may fine-tune what we remember, trading specifics for more general knowledge. When you purchase through links on our site, we may earn an affiliate ...

Sleep is essential for overall health, with adults recommended to get at least seven hours each night. However, many fall short, and if you leave on the TV as you try to drift off, it could be ...

When it was first released in 2015, the Apple Watch quickly earned the mantle of the best-selling device in the category, and millions of users have it on their wrists today. Its seamless pairing with ...

Disruptive sleep behaviors can keep you from sleeping well. Read on to learn which ones to watch for and when it's time to see a doctor. Annie Miller is a licensed psychotherapist in private practice ...