Add Yahoo as a preferred source to see more of our stories on Google. 7-9 hours remains the guideline, but not everyone needs that much sleep. Some need less, some need more. Sarah Mitroff/CNET If you ...

New sleep research links two measurable brain-wave patterns during deep sleep to sharper thinking, no matter how many hours ...

Few experiences rival the calm satisfaction of falling asleep easily and waking up feeling fully rested. But sleep is more than a luxury or idle downtime, it’s a vital biological process that supports ...

Sleep training helps babies (and parents) get sleep without disruption. Here's how to do it like a pro.

The middle of the night used to be my special time. I’d use it to cram for a test, read a mystery, or play Candy Crush—with no one around. As I got older, those nighttime hours became time to answer ...

Scientists now know that while we snooze, our brains help solidify the memories we made during the day. In this Special Feature, we investigate whether simple techniques might help improve memory ...

While some couples might sleep soundly together, for others, sharing a bed is anything but harmonious, especially for those with differing sleep styles. A restful night can be thwarted by tossing and ...

It can be tough to calculate exactly how long you’re in REM, but many health trackers use your heart rate, heart rate variability, and data on your movements to make solid estimations. (Just know that ...

A night-shift worker finishes at dawn. Their phone says Tuesday, but their body feels like it's Monday. The body's internal clock, or circadian rhythm, controls physiological processes such as ...

Sleep is important for everyone – but do women require more than men? This has been an ongoing discussion among researchers and medical experts, as they weigh the various biological factors that come ...

Many smartwatches, fitness and wellness trackers now offer sleep tracking among their many functions. Wear your watch or ring to bed, and you'll wake up to a detailed sleep report telling you not just ...