Medically reviewed by Sohaib Imtiaz, MD Key Takeaways Deep sleep is essential for health, making up 20% to 25% of total sleep time.Not getting enough deep sleep can raise the risk of problems like ...

Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is crucial for numerous bodily functions. But how to increase deep sleep isn’t ...

When you were younger, you might have thought older adults went to bed early simply because they loved quiet mornings and a ...

When it comes to brain health and strengthening memories, a good night’s rest is essential. New research highlights how important slumber is for older adults, finding that enhancing or maintaining ...

Strong circadian rhythms and good sleep may lower dementia risk. Learn how routines, exercise, and lifestyle habits support ...

A deep slumber might help buffer against memory loss for older adults facing a heightened burden of Alzheimer’s disease, new research from the University of California, Berkeley, suggests. Deep sleep, ...

Less slow-wave sleep over time raised the risk of incident dementia, prospective data showed. Each percentage decrease in slow-wave sleep per year in people 60 and older was tied to a 27% increase in ...

Higher nighttime light exposure is associated with increased light sleep duration, with complex effects on deep sleep duration. New research reveals how outdoor nighttime light exposure subtly impacts ...

Dear Doctors: I’m a 68-year-old man who cannot remember the last time I awoke in the morning feeling fully rested. My friends laugh and say those days are long gone for people our age. Is this true? I ...

WASHINGTON — Need another reason to prioritize your sleep? Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement sleep — may hasten the deterioration of parts of ...