Hosted on MSN

The 4 Stages of Sleep: What Happens During Each Cycle

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 ...
CNET

Alternative Sleep Cycles: How to Survive on 3 Hours of Sleep Each Night

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 ...
Hosted on MSN

Women Health: How sleep cycle changes with different stages of life

Sleep is quite crucial to the overall state of health, but women's sleep cycles differ with age, lifestyle, and hormones. Knowledge of the alteration may contribute to enhancing the quality of sleep ...
Los Angeles Times

Tired All the Time? Your Sleep Cycles (Or Sleep Calculator) Could Be the Key to More Energy

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 ...