Deep sleep or slow-wave sleep supports memory, growth, and cell regeneration. Not getting enough may contribute to some health conditions, including heart disease and Alzheimer’s disease. You may have ...

Slow wave or deep sleep is a stage in the sleep cycle necessary for proper brain function and memory. Most people need 7–9 hours of sleep per night, but working out how much deep sleep they need is ...

Now that we have wearables tracking our every move, a lot of us can look at stats that supposedly tell us how well we’ve slept the night before. But sometimes, it can feel like your sleep tracker is ...

"I have to get my deep REM sleep," expresses a common confusion about two very different types of sleep. Deep sleep and rapid eye movement (REM) sleep are not the same; they do not even overlap. They ...

Deep sleep is a mysterious state that we usually enter several times each night. Its nature is somewhat less well-known than the more dramatic "dream sleep." While we are very aware today of dream ...