Too much sleep means too much sleep, several hours or days longer than normal sleep. Excessive sleep can appear in many brain diseases, such as cerebrovascular diseases, brain trauma, encephalitis, brain tumors at the bottom of the third ventricle and near the sella turcica, etc. , can also be seen in urine poisoning, diabetes, sedative overdose, etc. How to shorten sleep time appropriately? Nowadays, people have a strong sense of time. Many people want to devote more time to work, study and socializing, so they often feel that time is not enough. If we squeeze out some sleep time on the premise of ensuring health, this is a method that people care about and have already implemented. A large number of experimental studies show that it is completely feasible to shorten the sleep time from 8 hours to 6 hours after a period of training, and it will not cause great harm to health. How can I shorten my sleep time appropriately? (1) Scientific measures should be taken. Saving sleep time scientifically is the key to turn long sleep into short sleep. For a person who sleeps for more than 8 hours for a long time, it is impossible to shorten the sleep time without scientific measures. The formulation of measures should vary from person to person. Generally speaking, it can be postponed at the rate of reducing sleep time by 30 minutes per week. When the sleep time is reduced to 6 hours a day, it is not appropriate to continue to reduce it. During and after the transition from long sleep to short sleep, you should take a lunch break for 30 ~ 40 minutes at noon, otherwise your energy and physical strength will not be supported. (2) Must be a combination of conscious and subconscious. Willingness means that you have the desire to save sleep time properly; Subconsciousness, also known as subconsciousness, refers to the unconscious psychological activity in psychology and the instinctive response of organisms to external stimuli. This function is a spiritual essence lurking under the consciousness, which can dominate all people's thoughts and actions. Everyone can have the will to do something, and there is a subconscious in his heart. When the will is consistent with the subconscious, the effect is not the sum of the two, but the product of the two. When the will confronts the subconscious, then the subconscious is inversely proportional to twice the will, that is, the power of the subconscious is twice that of the will, so only when the will absolutely overwhelms the subconscious can it succeed. For example, the will is "I really want to shorten my sleep time and do more things", while the subconscious is "staying awake for 8 hours will hurt my health". As a result, it is difficult to sleep for a short time, because the subconscious mind is deeply rooted and powerful, and only when I redouble my will can I compete with it. To achieve a short and mature sleep, doctors' hints and self-hints are often needed to fundamentally eliminate the subconscious mind and its formed concepts. From a large number of scientific experiments and actual situations, the subconscious mind of sleep can be changed. As long as you believe from the bottom of your heart that short sleep time has no adverse effects on your health and can benefit people from knowledge, wealth and social interaction, your subconscious will gradually change. (3) Have a tense and orderly rhythm. The use of saved sleep time is related to the consolidation of achievements after success. In work, study, business and social activities, we should cherish time, make full use of time and arrange time in an orderly way. Concentrate on your work when you are working, sleep in time when it is time to sleep, set your biological clock at a tense and orderly rhythm, lay a foundation for your health and work efficiency, and create conditions. It must be pointed out that saving sleep time is not feasible for everyone, and everyone can't be divorced from their own concrete reality when implementing it. At what stage do long sleepers prolong their sleep time? As we have mentioned in the related items, there are two stages in the whole process of sleep. These two sleep stages are fast wave sleep and slow wave sleep. In slow-wave sleep, it is divided into four stages: 1, 2, 3 and 4. The 1 stage of slow-wave sleep is the sleep stage, showing only a little drowsiness; The second stage is shallow sleep, which means that sleep is not deep and it is very easy to wake up; The third and fourth stages are moderate deep sleep and deep sleep, respectively. At this time, the sleeper's subconscious disappears and it is not easy to be awakened. The four stages of slow-wave sleep last about 90 minutes, and after slow-wave sleep, it enters fast-wave sleep, that is, rem sleep. There are about 4 ~ 5 such cycles in sleep every night. We have also introduced in related items that some people are long sleepers and need to sleep for at least 9 hours every day to get enough sleep; Some people are short sleepers, and they can maintain their vigorous work and study energy by sleeping only 5-6 hours a day. In these two groups of people with different sleep time, in which sleep phase and stage did they extend or shorten their sleep time respectively? According to the research in the sleep laboratory, in the first slow fast wave sleep cycle, fast wave sleep lasts only 5 ~ 10 minutes, and in the subsequent slow fast wave sleep cycle, the fast wave sleep time is gradually extended. Generally speaking, if there are five fast-wave sleeps every night, the total time is about 90 ~ 120 minutes, accounting for about 20 ~ 25% of the total sleep. If it is to prolong the total sleep time, it is mainly to increase the fast wave sleep. Therefore, long sleepers (people who sleep for more than 9 hours every night) mainly prolong the fast wave sleep, that is, the dream sleep stage. References:

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