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 ...

What happens in the brain and body during NREM and REM sleep As you sleep, your brain cycles through four stages of sleep. The first three are considered non-rapid eye movement (NREM) sleep, also ...

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

Now wide awake from a once peaceful slumber, you roll over to check the clock and find it’s 3 a.m. That’s the same time you woke up last night. And the night before. If that sounds familiar, it’s ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images There are tell-tale signs when you don’t get enough REM sleep. It’s the ...

Your hair grows in a cycle of four stages or phases. The stages are anagen (growth stage), catagen (regression stage), ...

Do you think you need a nightcap to get a good night's sleep? Explore the dark side of that myth and learn how to change your ...

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 ...

Understanding the risk factors associated with Alzheimer’s disease is a hot topic. With few effective treatments and increased prevalence, taking steps to potentially reduce risk is vital. The authors ...

Don’t skimp on good sleep. A healthy sleep schedule comes with massive health benefits, so you’ll want to make the most of your hours under the covers. But sometimes, staying in bed for the ...

Sleep Cycles: One rapid eye movement (REM) stage and three non-REM stages that altogether last about 90 to 120 minutes Benefits: Physical and mental recuperation and memory consolidation Disorders: ...

HOUSTON — A good night’s sleep is important for both the body and brain. It’s essential to understand the four stages of sleep and how to get more restful z’s. Stage 1: Transitional sleep The sleep ...