Why do so many people have trouble sleeping?

While sleep disorders are common, our modern lifestyles rob many people of rest. Michael Timothy Smith, MA, PhD, director of the Behavioral Sleep Medicine Program at Johns Hopkins University, explains.

The relationship between sleep and heart health may be a two-way street. Here’s what you need to know to improve both.

Constant caffeine, skipped workouts and other perils of the late-night worker.

Too much screen time can harm sleep, mood, and much more.

Are you wondering if this popular supplement is a safe way to get more sleep? Get the facts.

Learn how sleep loss factors into higher anxiety and depression rates—and what to do about it.