What does sleep do for you?
Researchers have also shown that after people sleep, they tend to retain information and perform better on memory tasks. Our bodies all require long periods of sleep in order to restore and rejuvenate, to grow muscle, repair tissue, and synthesize hormones.
Sleep serves to reenergize the body's cells, clear waste from the brain, and support learning and memory. Most of the sleeping we do is of the SWS variety, characterized by large, slow brain waves, relaxed muscles and slow, deep breathing, which may help the brain and body to recuperate after a long day.
- The scientific study of dreams is called oneirology. Dreams mainly occur in the rapid-eye movement (REM) stage of sleep—when brain activity is high and resembles that of being awake. REM sleep is revealed by continuous movements of the eyes during sleep. At times, dreams may occur during other stages of sleep.
- The dichotomous terms conscious and unconscious imply that consciousness is an either/or state – the brain is either on or off. But the transition from wake to sleep is rarely like turning out the lights. More often there is a gradual reduction in consciousness with fuzzy, halfway states in between.
- All cells in your body need oxygen, which they use to produce energy. This includes neurons. Your brain requires a lot of energy, so it depends on oxygen, which is delivered through the blood. Cells produce energy through a process called cellular respiration.
Too much sleep on a regular basis can increase the risk of diabetes, heart disease, stroke and death according to several studies done over the years. Too much is defined as greater than nine hours. The most common cause is not getting enough sleep the night before, or cumulatively during the week.
- Too much sleep on a regular basis can increase the risk of diabetes, heart disease, stroke and death according to several studies done over the years. Too much is defined as greater than nine hours. The most common cause is not getting enough sleep the night before, or cumulatively during the week.
- Most teens need between 8½ to more than 9 hours of sleep a night. If you get much more or much less, you may wake up feeling tired and unrefreshed. People who sleep too long also may have trouble falling asleep and wake up a lot during the night.
- However, the cost of all those sleepless nights is more than just bad moods and a lack of focus. Regular poor sleep puts you at risk of serious medical conditions, including obesity, heart disease and diabetes – and it shortens your life expectancy.
Updated: 28th November 2019