Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is ...

During sleep, your body cycles through four different stages, all of which affect your brain waves, muscle relaxation, recovery, and breathing. Share on Pinterest Illustration by Brittany England ...

Scientists think that manipulating brain waves while we dream could help treat ... during the rapid eye movement (REM) phase of the sleep cycle – named after the jerking motion of our eyes ...

Airplanes can be some of the noisiest and most uncomfortable places to try to catch some sleep, but there’s a game-changing ...

Short sleepers cruise by on four to six hours a night and don’t seem to suffer ill effects. Turns out they’re genetically ...

Are you bored of being told that you need to work on your core? Well, you do. But here’s the good news. The best exercise ...

On a good night, we cycle four or five times through several stages of sleep ... in the percentage of brain activity that’s composed of big, rolling delta waves, as measured on an EEG.

Basically, your brain slows down progressively over each ... you are most likely experiencing a disruption to your slow wave sleep cycle. More broadly, though, not having enough slow wave sleep ...

The sleep cycle consists of four stages ... In the sleep lab, we can tell from their brain waves, eye movements and the tension in their muscles, like in the chin. These are measured by putting ...