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

Get a deeper understanding of the health metrics your smartwatch measures for you, so you can make full use of them.

Numerous components beyond length of sleep have important ties to cardiometabolic disease and related risk factors.

Some research suggests that a man’s drive tends to decline with age. One study found that the drive of middle-aged men (40–60 ...

Are smartwatch health features like heart rate and SpO₂ monitoring really accurate? Here’s what Indian users should know ...

Healthy sleep includes multiple components, such as number of hours of sleep per night, how long it takes to fall asleep, daytime functioning and self-reported sleep satisfaction, and addressing these ...

I had a baby six months ago, and for the last month and a half have been unsuccessful in getting my husband to resume our sex ...

While caffeine may help by "reducing sleep inertia", even when these drinks are consumed in the morning, they can still ...

Dream recall is associated with age, attitude toward dreaming, sleep patterns, and seasonal changes among healthy adults.

Costing a reported $2million per year and requiring more than 100 supplements per day, Bryan Johnson’s (yes, the same one ...

Humans and mice with a predisposition for ALS displayed altered sleep patterns before symptoms began, offering a potential ...