The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced.

Your nightly sleep cycle plays a key role in the quality of your sleep. Here's what happens in each stage and why it matters for overall well-being.

Sleeping for 7 to 9 hours at night isn't the only way to catch some z's. Here are four alternative sleep cycles -- and they're pretty obscure. Lara Vukelich Lara Vukelich is a freelance writer in San ...

Ever wonder why some mornings you wake up ready to go, and others you feel like a zombie? The difference often comes down to when you wake up during your sleep cycle, and that’s exactly what a sleep ...

7-9 hours remains the guideline, but not everyone needs that much sleep. Some need less, some need more. Sarah Mitroff/CNET If you find yourself asking, “How much sleep do I need?” you’re not alone.

A one-hour shift to an earlier sleep schedule could drop risk of major depression by 23%, according to a study. A team of researchers from University of Colorado Boulder and the Broad Institute of MIT ...

What some call the dozing off stage, the first sleep stage marks the transition from wakefulness to sleep. It typically happens over a few minutes, per the National Sleep Foundation, and it initiates ...

Morning sunlight plays a crucial role in regulating your body's internal clock, known as the circadian rhythm. Exposing your ...

A one-hour shift to an earlier sleep schedule could drop risk of major depression by 23 percent, according to a study. A team of researchers from University of Colorado Boulder and the Broad Institute ...