Your Brain's Night Shift A 2023 study found a strong link between the content of dreams and the consolidation of newly formed ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

REM stands for rapid eye movement — a stage in the sleep cycle when your brain is almost as active as when you’re awake. Getting enough REM sleep is crucial, as it helps you store information and ...

BUFFALO, N.Y. – In a health and wellness culture that reveres sleep, a popular but under-researched topic is lucid dreaming or vivid dreaming. But what exactly do those terms mean? And how might they ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Need another reason to prioritize your sleep ...

A month with the Apple Watch, along with its gentle nudges and a doctor’s guidance, helps the writer build a healthy sleep ...

Taking too long to enter the phase of sleep in which we dream may be an early sign of Alzheimer's disease. This is the conclusion of an international team of researchers who studied the sleep patterns ...

healthy. Bodybuilders, for example, rely on deep sleep to boost levels of growth hormone, which builds muscle and burns fat.

Let's talk about one of the most confusing terms you’ll see on your fitness tracker—specifically your Apple Watch. Next to REM sleep, which you’ve probably heard of, and “deep” sleep, which feels self ...