Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement, or REM, sleep — may hasten the ...

How Much Sleep Do You Really ... get more “deep sleep,” with about 50% of the night in that realm, she said. That drops at adolescence, Atwood said, because our body doesn’t need the same ...

What it does and how much we need ... it if you're woken up during deeper sleep. Like other sleep stages, including REM sleep, the amount of deep sleep we get generally decreases as we age.

REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

Chances are, if you’re reading this, you got some sleep last night. But are you feeling rested? Experts say it’s an important ...

while babies need much more — in fact, infants can spend about 50% of their sleep in REM. To make matters worse, deeper stages of sleep decrease as you age, Cho said. Deep sleep tends to come ...

while babies need much more — in fact, infants can spend about 50% of their sleep in REM. To make matters worse, deeper stages of sleep decrease as you age, Cho said. Deep sleep tends to come ...