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

It's no secret that a good night's sleep is key to a healthy brain. However, the full extent of the importance of rest on our ...

Obstructive sleep apnea (OSA)—when the soft tissues in the throat collapse and block the airway—especially correlates to ...

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

Andrew Huberman, Ph.D., shared the science-backed morning and evening routines that are guaranteed to boost your focus during ...

Only the last two stages of sleep, deep sleep and rapid eye movement (REM) sleep, are considered restorative, Nicole Avena, PhD, assistant professor of neuroscience at the Mount Sinai School of ...

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 ...

This is where smart rings may have a competitive edge over smartwatches. According to a 2022 review published in the journal ...

11, 2025 — For people with a certain sleep disorder, a simple blood test could help predict the development of dementia years before symptoms appear, a new study indicates. Idiopathic REM sleep ...

Waking up in the middle of the night can be incredibly frustrating, especially when you struggle to fall back asleep. A ...

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 ...

How Sumatra Slim Belly Tonic Promotes Overnight Weight Loss by Resetting Circadian Rhythms and Metabolic HealthNew York City, ...