Sleep can be divided into 2 phases — non-rapid eye movement (NREM) and rapid eye movement (REM) — and 4 stages that make a complete cycle. You’ll typically complete 4 to 6 cycles per night.

Licuanan, author of "How to Get Your Resisting Loved One Into Treatment," offered the following five tips on how to ... "[Alcohol] could impair certain stages of sleep, causing you to feel groggy ...

Dr Guy tells us, ‘If you’ve been awake for seventeen hours, your cognitive functioning is the equivalent to having a blood alcohol level of 5% which ... lightest stages of sleep, and actually ...

On a good night, we cycle four or five times through several stages of sleep, each with distinct qualities and purpose—a serpentine, surreal descent into an alternative world. Wile, the seven ...

The body goes through five stages of sleep during one night. You want to make sure that your body is completing all of the cycles that are intended in order to feel rested. Studies are also ...

Caffeine survives in the body from 5 to 7 hours, meaning the effects ... Studies have found that caffeine before bed can decrease stages three and four of sleep, two of the most restorative ...