Add Yahoo as a preferred source to see more of our stories on Google. You know as well as we do that the amount and type of sleep you get every night can significantly affect your mood, energy level ...

What is core sleep is on your Apple Watch, and does it even matter? We look at which sleep stages matter most for quality ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

Pink noise — low-frequency broadband noise often used in sound machines and sleep apps — is associated with a decrease in REM ...

Sound machines may not be the sleep saviors many believe. Researchers found that pink noise significantly reduced REM sleep, ...

PHILADELPHIA -- Marketed as a ticket to deeper sleep, the soft hum of pink noise has become part of millions’ nightly ...

Sound machines promise better sleep, but new research suggests they may quietly steal your REM and deep sleep.

Sound machines and “sleep sounds” are often marketed as a cure for restless nights, but new research suggests they may ...

A recent study suggests that pink noise may interfere with REM sleep nd reduce overall sleep quality. The researchers say ...

New research shows 86% of adults are sabotaging REM sleep with everyday habits.