Deep sleep is the mentally and physically restorative stage of sleep. How much of it do you actually need?

Simple nighttime habits can improve deep sleep, helping the body recover, repair, and wake up feeling refreshed.

Most healthy adults spend roughly 20 per cent to 25 per cent of the night in REM sleep, while deep sleep typically accounts ...

It might be worth working a little bit harder to get that much-desired, but often elusive, good night's sleep. Deep sleep clears the mind of waste just as a "dishwasher" cleans dirty plates and ...

Want to burn fat, build muscle, and protect your brain from decline? A groundbreaking new study shows exactly why skimping on ...

When it comes to managing anxiety disorders, William Shakespeare’s Macbeth had it right when he referred to sleep as the “balm of hurt minds.” While a full night of slumber stabilizes emotions, a ...

Researchers play ultra-brief tones to stimulate the brain during deep sleep. This stimulation improves cardiac output and relaxation of the left ventricle. Such technology to improve cardiovascular ...

Research has linked lack of deep sleep to memory issues in people at risk of developing Alzheimer’s disease. This isn’t the first study to tie deep sleep to Alzheimer’s risk. Experts say focusing on ...

Everything you need to know about the all-important third stage of your sleep cycle. Unfortunately, sleep is far from an exact science, so getting more deep sleep isn’t as simple as ticking a few ...

Researchers have known for a while about a connection between insufficient sleep and anxiety. A new study strengthens and quantifies this causal relation and shows that a sleepless night can raise ...

Starting my mornings by checking my sleep tracker is part of my daily ritual. It gives me a snapshot of not just how much I slept the night before, but also how well I slept. But there are mornings ...