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  1. Sleep - Wikipedia

    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 muscle activity …

  2. Benefits of Sleep: Improved Energy, Mood, and Brain Health

    Jul 22, 2025 · Sleep is a complex biological process made up of several stages that cycle throughout the night. These stages include rapid eye movement (REM) sleep and non-REM …

  3. Sleep tips: 6 steps to better sleep - Mayo Clinic

    Jan 31, 2025 · 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 — …

  4. Sleep: What It Is, Why It’s Important, Stages, REM & NREM

    You spend about one-third of your life sleeping, but it’s still something many struggle with. Researchers and experts also struggle with it because of the mysteries surrounding how and …

  5. What happens during sleep — and how to improve it

    Jun 1, 2025 · Sleep impacts 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, …

  6. About Sleep | Sleep | CDC

    May 15, 2024 · About Sleep Key points Good sleep is essential for our health and emotional well-being. Getting enough sleep and good sleep quality are essential for healthy sleep. The …

  7. The Science of Sleep: Understanding What Happens When You …

    Throughout your time asleep, your brain will cycle repeatedly through two different types of sleep: REM (rapid-eye movement) sleep and non-REM sleep. The first part of the cycle is non-REM …

  8. Sleep Medicine: UChicago Sleep Center - UChicago Medicine

    Our sleep experts provide and support patient care, education and research. The center aims to foster growth, collaboration and success in diverse areas of science and medicine at both the …

  9. What Is the Best Sleeping Position? - Sleep Foundation

    Jul 25, 2025 · Specifically, sleeping on the side or back is considered more beneficial than sleeping on the stomach. In either of these positions, it’s easier to keep your spine supported …

  10. Sleep - American Heart Association

    Getting a good night’s sleep every night is vital to cardiovascular health. Adults should aim for an average of 7-9 hours, and babies and kids need more depending on their age. Too little or too …