As we sleep, our brain moves through four stages and two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). The brain has four stages within the NREM phase. Each stage and phase of ...

Sleep is a fundamental aspect of our lives. It is a natural process that rejuvenates our bodies and minds, allowing us to function optimally during our waking hours. However, not all sleep is the same ...

Sleep is kind of a big deal. It’s the best way for our bodies to recover after a hard day, and it also greatly influences our cognitive functions and immune responses. Yet while many of us focus on ...

In general, most adults need between seven and nine hours of sleep per night. Someone who gets this recommended amount will generally go through between four and six sleep cycles (all of the sleep ...

We all know that particular sleepy sensation that we feel when we are tired or after a long day. Were you aware that this is the beginning of a whole complex cycle in our brains? Once we close our ...

We’ve all been there — dragging ourselves out of bed feeling like we’ve been hit by a truck despite getting a full night’s sleep. The alarm blares, and you wonder how eight hours of rest could ...

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. Annie Miller Medical Reviewer Annie Miller is a licensed ...

The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced. By Clarissa Brincat Published Sep 9, 2025 9:00 AM EDT Image: DepositPhotos Get the ...

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 ...