Sleep trackers — wearable devices that monitor all your vitals — provide detailed summaries of your sleep cycle so you know ...

During REM sleep, your heart rate increases, your blood pressure elevates, and your eyes move. REM sleep may also be the time when your brain processes emotions and solidifies memories.

Scientists have long noted eerie parallels between psychedelic trips and rapid eye movement (REM) sleep, the stage during which you dream. Some even suggest psychedelics could induce a “waking ...

A good night's sleep is the best gift you can give yourself ... summaries of your sleep cycle so you know how many hours of REM, deep, and light sleep you're getting. Most fitness trackers ...