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Sleep problems are especially common among older adults—20% of adults over age 65 experience sleeping problems compared to 14% of adults between the ages of 18 and 44.
Sleep efficiency (SE) is the ratio between the time a person spends asleep, and the total time dedicated to sleep (i.e. both sleeping and attempting to fall asleep or fall back asleep). It is given as a percentage. [1] SE of 80% or more is considered normal/healthy with most young healthy adults displaying SE above 90%.
National Geographic Magazine has reported that the demands of work, social activities, and the availability of 24-hour home entertainment and Internet access have caused people to sleep less now than in premodern times. [205] USA Today reported in 2007 that most adults in the USA get about an hour less than the average sleep time 40 years ago ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 12 January 2025. Short period of sleep during typical waking hours For other uses, see Nap (disambiguation). A man napping in a hammock, on a patio in Costa Rica A nap is a short period of sleep, typically taken during daytime hours as an adjunct to the usual nocturnal sleep period. Naps are most often ...
Two new studies suggest once again the importance of getting a good night's sleep for good health over a lifetime, as scientists pursue new understandings of restorative deep sleep.
The 2002 Sleep in America poll (1,010 people surveyed) first suggested that as many as 47 million Americans were risking injury and health problems because they were not sleeping enough. [7] Media coverage of 2002 Sleep in America poll suggested a sleep "crisis" and an "epidemic," and included headlines suacha as "Epidemic of daytime sleepiness ...
According to the National Sleep Foundation, nearly 45% of people report feeling more tired during the winter, and a large part of that is due to the shorter days and longer nights. But it's not ...
MSLT Scores Minutes Sleepiness 0–5: Severe 5–10: Troublesome 10–15: Manageable 15–20: Excellent A sleep onset latency of 0 to 5 minutes means severe sleep deprivation, 5 to 10 minutes is "troublesome", 10 to 15 minutes indicates a mild but "manageable" degree of sleep debt, and 15 to 20 minutes is indicative of "little or no" sleep debt.