FOUR STAGE OF SLEEP SYNWIN MATTRESS◪Sleep stage: close your eyes and start to sleep. Your brain wave gradually slows down and you are in a relaxed state. After a few minutes, your heart beats slowly and steadily, and your breathing is deep and regular. At this time sleep is very shallow, belongs to semi sleep state, can receive peripheral sound, this stage can maintain 10 seconds to 10 minutes or so.◪Light sleep stage: at this time, the brain wave will show sharp fluctuations, lasting about 10-20 minutes, the body into a relaxed and static state, consciousness gradually separated from the surrounding environment, this is the beginning of real sleep.◪Deep sleep stage: after 20-30 minutes, it enters the third stage, with slow heartbeat, slow brain wave but high pressure fluctuation.◪Deep sleep stage: entering the fourth stage of sleep, your muscles are completely relaxed, your blood pressure is reduced, and your breathing is long.Deep sleep is very important to the human body◪A.the metabolism activity is slow and the body is relaxed, which helps to restore the muscle ability.◪B.the blood flow to the brain increased, and the damaged brain nerve cells were repaired.◪C.lower body temperature, conserve energy and restore physical strength.◪D.the baby's brain continues to develop in deep sleep.a◪E.the pituitary gland secretes growth hormone, and the bone development of adolescents increases during REM sleep.◪F.repair oxidized collagen to make skin smooth and elastic.
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