A multiple sleep latency test (MSLT), also known as a daytime nap opportunity study, is a sleep study that measures excessive daytime sleepiness. The test evaluates how fast you fall asleep in a quiet ...

These top-rated sleep trackers make it easier to monitor your rest and improve your sleep habits by using cold, hard data.

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 ...

Researchers found that worse sleep habits were tied to brains that appear, on average, about one year older than a person’s real age. The study loo ...

Colino is a contributor for TIME. Colino is a contributor for TIME. In a culture that’s highly goal-oriented, yet another form of performance anxiety has emerged: It’s called orthosomnia, and it ...