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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 and …

  2. 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, and simple ways …

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

    Jul 22, 2025 · Getting enough quality sleep is essential for both mental and physical health. Key benefits of sleep include: Like eating well, staying hydrated, and exercising regularly, getting enough quality …

  4. 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 amount of sleep …

  5. Sleep: How Much You Need and Its 4 Stages

    Dec 3, 2021 · Sleep is a catch-all that benefits your physical, mental and emotional health. When you’re sleeping, your body has the chance to rest and recover — and these restorative properties even …

  6. Sleep | Psychology Today

    Sleep is the balm that soothes and restores after a long day. Sleep is largely driven by the body’s internal clock, which takes cues from external elements such as sunlight and temperature. The...

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

    Sleep accounts for one-quarter to one-third of the human lifespan. But what exactly happens when you sleep? Before the 1950s, most people believed sleep was a passive activity during which the body …

  8. Healthy Sleep - MedlinePlus

    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 different stages of non …

  9. Sleep Tips - National Sleep Foundation

    It’s important for your body to have a regular sleeping schedule. Set a relaxing bedtime routine, such as listening to calming music, reading a book or taking a warm bath.

  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 much …