https://en.wikipedia.org/wiki/Sleep
Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in mu
https://www.sleepfoundation.org/how-sleep-works/why-do-we-need-sleep
Jul 10, 2025 · Everyone needs sleep, but about one in three American adults don’t get enough of it. The consequences of sleep deprivation are serious, so it’s worth learning w
https://my.clevelandclinic.org/health/body/12148-sleep-basics
Jun 19, 2023 · Sleep is a body process that allows your body to rest, repair and restore itself. You need sleep to function properly. Lack of sleep has links to many health issues
https://www.cdc.gov/sleep/about/index.html
May 15, 2024 · Quality sleep means you are getting uninterrupted and refreshing sleep. Getting quality sleep is not just about how many hours you sleep, but how well you sleep.
https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep
Sleep is a complex and dynamic process that affects how you function in ways scientists are now beginning to understand. This webpage describes how your need for sleep is regulated
https://medlineplus.gov/healthysleep.html
Dec 9, 2025 · Sleep is a natural process that helps your body restore energy, supports learning and memory, and keeps you healthy. During sleep, your brain cycles through differen
https://www.health.harvard.edu/sleep/what-happens-during-sleep-and-how-to-improve-it
Jun 1, 2025 · Sleep affects nearly every part of your health, from brain function to immune strength. Learn what happens in each phase of sleep, how to manage common disruptions,
https://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/sleep/art-20048379
Consider simple tips for better sleep, from setting a sleep schedule to including physical activity in your daily routine. Many factors can interfere with a good night's sleep —
https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-science-of-sleep-understanding-what-happens-when-you-sleep
What exactly does sleep do for your body and mind? Here’s what researchers know about the science of sleep—including the stages of sleep, your biological clock, health connecti
https://www.heart.org/en/healthy-living/healthy-lifestyle/sleep/what-is-good-sleep-and-how-much-do-i-need
Jan 29, 2024 · Learn about the quality and quantity of sleep you need to stay healthy, and get recommendations for each age group and tips for better sleep.