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 …

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 sleep, each of which …

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 …

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 why we sleep and …

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 …

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 …

Aug 9, 2025 · Most adults need between seven and nine hours of sleep per day to maintain good health. Lack of sleep is linked to greater risks for heart disease, diabetes, and weight gain. Getting enough …

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 sleep, which …

Sleep affects almost every type of tissue and system in the body—from the brain, heart, and lungs to metabolism, immune function, mood, and disease resistance.

Nov 21, 2025 · Making changes to your diet and lifestyle may help improve your sleep quality. Certain supplements and natural remedies could also be beneficial. A good night’s sleep is just as important …