Mattress manufacturer-five different stages of a complete source of sleep
by:Suiforlun mattress
2021-09-29
Mattress manufacturers, human sleep is divided into five major stages: the first stage is light sleep, only a few minutes, is the transition from waking to deep sleep, the first stage does not belong to real sleep, real sleep is the first stage. Stages 2-4 and paradoxical sleep. For healthy adults with good sleep, the first stage sleep time only accounts for 5% of the total sleep time. In the first stage, it is easy to fall asleep and wake up easily. In this stage, the eye movement is very slow, and the muscle activity is also very slow. People who awaken from the first stage of sleep often have the impression of intermittent muscle twitching, which is called myoclonus during sleep. There is often a premonition of falling, and after these twitches begin, it is like a 'startle'. The second stage sleep accounts for 45% of human sleep time. Eye activity stops, eyelids open and close slowly, and brain activity slows down. Eye movement stops and body temperature drops. Breathing is regular. The third and fourth stages are collectively referred to as deep sleep. This part of sleep is the main part of restoring energy. The third stage is the transition from the second stage to the fourth stage. It accounts for about 7% of sleep time. According to EEG examination, it contains 50% of 'slow wave activity.' If the 'slow wave activity' exceeds 50%, then it enters the deepest sleep period, and the fourth stage accounts for about 15% of sleep time. There is no eye movement and muscle activity at this stage. People in the third and fourth stages of sleep are in deep sleep and are not easily awakened. If they are awakened, they often feel staggered and unstable for a period of time. Some children may have night terrors and sleepwalking during sleep. These stages of sleep start from the first stage to the end of paradoxical sleep, repeat the cycle, and restart the first stage after the end of paradoxical sleep. 50% of adult sleep time is in the second stage, 20% is in paradoxical sleep, and 30% is in other stages. The paradoxical sleep period of the first cycle of sleep every night is shorter, and the deep sleep period is longer. With the prolonged sleep time, the paradoxical sleep period is gradually extended, and the deep sleep period is shortened. In the morning, the sleep time is almost entirely in the second stage and paradoxical sleep period. There are generally four to five cycles of sleep every night, and a complete sleep cycle generally lasts for 90 to 110 minutes. These stages of sleep start from the first stage to the end of paradoxical sleep, repeat the cycle, and restart the first stage after the end of paradoxical sleep. 50% of adult sleep time is in the second stage, 20% is in paradoxical sleep, and 30% is in other stages. The paradoxical sleep period of the first cycle of sleep every night is shorter, and the deep sleep period is longer. With the prolonged sleep time, the paradoxical sleep period is gradually extended, and the deep sleep period is shortened. In the morning, the sleep time is almost entirely in the second stage and paradoxical sleep period. There are generally four to five cycles of sleep every night, and a complete sleep cycle generally lasts for 90 to 110 minutes. Disclaimer: This article is edited and reprinted, and the purpose of reprinting is only to convey more information. If you think that our reprinting violates the 'Copyright Law' or harms your interests, please contact us in time and we will deal with it in a timely manner.
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