
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 …
Sleep: What It Is, Why It’s Important, Stages, REM & NREM
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.
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 why sleep matters, how it …
About Sleep | Sleep | CDC
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.
Brain Basics: Understanding Sleep - National Institute of Neurological ...
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 and what …
Why Is Sleep Important? - Encyclopedia Britannica
Feb 17, 2026 · Sleep is crucial for health, allowing the body to repair tissues, consolidate memories, and balance vital physiological systems.
What Is Sleep and How Does It Work? - sleepapnea.org
Oct 17, 2024 · We spend a third of our lives doing it, but have you ever wondered what is sleep, exactly? Learn why sleep is so important and get tips for sleeping better.
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 …
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 — from work stress …
Sleep hygiene: Simple practices for better rest - Harvard Health
Jan 31, 2025 · Sleep hygiene is a set of practices and routines that help you get better sleep. Adequate, good quality sleep allows your body to experience the physical maintenance and repair, immune …