What is a sleep study? A sleep study, also known as a polysomnogram, is a diagnostic test that monitors various body functions while a person is asleep. It is most commonly used to diagnose sleep ...

If you snore and make loud gasping noises during sleep, only to wake up in the morning feeling tired, you may have sleep apnea, a common sleep disorder characterized by temporary pauses in breathing.

The old advice to simply get eight hours misses a bigger picture, researchers say. New studies reveal that timing, ...