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.
What does your brain do when you are sleeping?
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.
What happens when you get too much sleep?
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.