It may seem innocent, but it's probably getting in the way of good rest.

Add Yahoo as a preferred source to see more of our stories on Google. Person wearing a wearable sleep tracker in bed Light sleep is the beginning of your sleep cycle and your body's way of winding ...

On World Sleep Day 2026, experts explain how much sleep adults really need, why sleep quality matters for health, and tips to improve restful, restorative sleep.

Taking a nap is a roll of the dice; sometimes, you rise refreshed, and other times, you wake more exhausted than before you closed your eyes. There’s a reason for that discrepancy, according to Thomas ...

A new study reveals that not getting enough of specific stages in the sleep cycle may be linked to cognitive decline and potentially may lead to Alzheimer's disease. Researchers from the Yale School ...

Image of an iPhone (with Health app visible) next to an Apple Watch. (Apple) Apple Health brings sleep tracking, scheduling and long-term analysis into one place, with your iPhone acting as the hub ...