However, the more you sleep, the better your concentration.

Because three hours of sleep is enough.

Do you know there are two kinds of sleep? Namely "rapid eye movement sleep" and "non-rapid eye movement sleep".

Rapid eye movement sleep is short for rapid eye movement sleep, and rapid eye movement is short for rapid eye movement period, which means rapid eye movement period. So named, because when you sleep at dawn, the eyeballs under your eyelids will keep shaking. If you try to measure brain waves at this time, you will find that brain activity is extremely hot. If you ask what the brain is busy with, the answer is "memory classification".

A lot of information will be transmitted to the brain through the sensory system. If you recite it all, your brain will be abnormal, so the news is divided into "important memory" and "dispensable memory".

The so-called important memory is something indispensable for making a living, such as the names of family members and bosses; In contrast, the artist's name is indispensable. Just like putting ordinary clothes in the innermost closet, unnecessary things are often buried in the depths of your heart.

However, anything that is remembered will be kept in the brain and will not be erased. Even decades later, it may be remembered again because of an opportunity. Take myself as an example. When my father died, I used to recall my childhood memories with my father because of his smell.

In addition, when inquiring about medical materials, in order to avoid forgetting, I don't memorize or copy notes, but just skim them inadvertently. Because I know that the brain will not erase the memory, as long as we recall the information fragments that we have briefly browsed when necessary and integrate them, we can construct a new theory.

Before this classification, the brain must rest, which belongs to deep sleep just after falling asleep, called non-rapid eye movement sleep. At this time, the brain is completely dormant, even if it shakes slightly or silently, it will not wake up, which is simply a state of deep sleep. But the time of non-rapid eye movement sleep is not long, just three hours.

Once the human brain is tired, it can't concentrate, so in order to rest the brain, it must have three hours of non-rapid eye movement sleep.

After three hours, I'll be dreaming over and over again. At this time, my brain is working hard. The so-called dream is that the brain randomly browses the recent memory and then distinguishes whether there is a necessary state, so it needs three hours of rapid eye movement sleep.

Three hours of non-rapid eye movement sleep and three hours of rapid eye movement sleep add up to six hours, which is a healthy sleep time.

When an annoying situation occurs, double your REM sleep time to six hours. That is to say, "sleep first and then get into the quilt", which will wipe away unpleasant memories in your mind.

However, if there are no special troubles and everything goes well at work, three hours of non-rapid eye movement sleep is enough. Take me personally for example. As the delivery date approaches, the book god comes. I can continue to write as long as I sleep for three hours every day, and I don't feel tired at all. This is the so-called "forgetting to eat and sleep".

However, this kind of non-rapid eye movement sleep is not suitable at all times. Even if you fall asleep during the day, you can't go into deep sleep, because sympathetic nerves excite your brain. Entering non-rapid eye movement sleep around midnight is most in line with people's physiological state.

The ideal sleep period is "from night 10 to 2 am", which is the so-called "golden time for sleep".

If you enter the so-called "non-rapid eye movement sleep" deep sleep at this time, not only can your brain get a full rest, but your brain will also secrete a growth hormone called "rejuvenation hormone" to rejuvenate your digestive tract skin and mucosa.

This can not only prevent cancer, but also achieve slimming effect due to the burning of visceral fat. Because prime-time sleep helps the body fight against age, it can make us concentrate more on our work.

Go to bed immediately after supper.

On the other hand, when is the best time to go to bed?

It is often said that you should not go to bed within three hours after meals. It is said that the reason is that "sleeping immediately after meals will make me fat", which makes me smile.

In other words, sleep is good for digestion? Is the idea of absorption not recognized?

In this case, it also proves that it is enough to eat enough nutrition, whether it is full or "one meal a day" that I strongly advocate.

On the other hand, do people who don't sleep immediately after eating digest it? Absorption disorder.

Although some people argue that "going to bed immediately after a meal is bad for digestion? Absorb ",(www.lishixinzhi.Com) But isn't there a saying that" the baby is sleepy, one inch is bigger "? Animals go to bed immediately after a full meal. Is this because parasympathetic nerves become stronger after falling asleep, which is beneficial to digestion? Absorb.

Others advocate that "it is recommended to exercise after meals to burn calories", which is completely suicide.

Sports meeting * * * Sympathetic nerve, why make a person who is ready to get into bed excited? Even marathon runners don't go running when their stomachs swell after eating.

Others argue that "lying flat immediately after a meal will cause gastric juice reflux, so please watch TV for three hours before going to bed", but this should also be avoided. The light emitted by TV and computer screens, smart phones and game consoles is called "blue light".

Because this light belongs to the shortest wavelength of human visible light, similar to ultraviolet light, once it is irradiated by this light, the pineal gland of the brain will misjudge it as sunlight and reset the physiological clock to daytime mode.

Therefore, the sympathetic nerve will be excited, which will lead to insomnia. Once insomnia, growth hormone, which belongs to rejuvenation hormone, will stop secreting. If you take sleeping pills to solve the problem of insomnia, you will be in a daze during the day and can't concentrate on your work.

Therefore, please go to bed immediately after dinner. Clean up after meals. Please take care of the unfinished work slowly during the undisturbed life bonus period in the early morning. Anyway, go to bed first.

Take myself as an example, whenever I eat the only dinner in a day, I always feel sleepy instantly, so I get into bed when I am still sleepy and fall asleep in a few minutes. For me, non-rapid eye movement sleep at this time is the source of attention.

If there is a job that must be finished on the same day, please give up dinner and finish the job.

After dinner, I can't stay focused even if I rub my sleepy eyes and work overtime with coffee and cigarettes.

brief Introduction of the content

An authoritative surgeon, who is engaged in operations that are not allowed to make mistakes every day, does it more than 1000 times a year. From the perspective of medicine and health, he teaches you to find out the "attention-improving factors" from your living habits through sleep, exercise, food, environment and brain, so as to improve your attention correctly and effectively! Whether you are an office worker or a student, you can find the best habit of strengthening your concentration through this book!

Brief introduction of the author

Nan Ji Yun used to be a plastic and reconstructive surgeon at Tokyo Women's Medical University, a surgeon at the Affiliated Hospital of Cancer Research Association, and the chief physician of the First Surgical Breast Clinic of Tzu Chi Chi Hui Medical University in Tokyo. Later, he established Nanyun Clinic in Tokyo, Nagoya, Osaka, Fukuoka and Sapporo. With the aim of "protecting the beauty, health and function of women's important breasts", he performs more than 1000 breast cancer operations and reconstructions in Japan every year.

Besides, his own rejuvenation regimen, such as "one meal a day", "burdock tea" and "cold water bath", is even more topical. In addition to being a frequent visitor to the attending doctor's special search clinic (Tokyo TV), I also participated in many TV programs. His works include many bestsellers, such as slimming, anti-aging and activating cell magic tea (published in Shang and Zhou Dynasties), Born without Rust by Dr. Nan Yun (published in Shang and Zhou Dynasties) and Health Miracle of One Meal a Day.