Sleep often becomes lighter and more fragmented with age. A neurologist explains why older adults wake up more at night, when ...

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 ...

Q: Do older adults need the same amount of sleep as younger adults? How does aging affect one's sleep? A: The need for sleep stays fairly constant over the course of a person's lifespan. Unlike ...

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 ...

You’ve heard of REM sleep but what about deep sleep? Experts share why it’s important and how to make sure you’re getting enough of it.

Losing as little as 1% of deep sleep each year has been linked to a 27% increase in dementia risk, results of a retrospective cohort study show. Researchers suggest that prioritizing deep sleep — also ...

Deep sleep, also known as non-REM slow-wave sleep, can act as a 'cognitive reserve factor' that may increase resilience against a protein in the brain called beta-amyloid that is linked to memory loss ...

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 ...

EXCLUSIVE: Many of us make lifestyle changes every January - now a sleep expert explains why we sometimes can't stick to them ...