● modern various media constantly publicized in the 22:00 to 23:00 sleep is the best, the reason is: 12:00 to 3:00 at night, is a person's deep sleep period, as long as the three hours of sleep, to ensure that the day has the spirit of the spirit, if you miss it, it will be a very bad effect on the body. And from falling asleep to enter a deep sleep is generally 30-60 minutes, so, 10:00-10:30 at night to sleep the best.

● However, this "observation" is rather "one-sided". This is because the observer is observing from the premise that sleep must be at night.

● Then what is the "fact", we can see the "reality": the city's "night shift" workers, especially the "night shift drivers", are not able to sleep at night, but they are able to sleep at night. "Night shift drivers" work at night and sleep in the morning, and if the above findings are "correct", then all these "night shift" workers are dead, or at least infected with various "diseases". infected with all kinds of "diseases", and were unable to work, etc. But they lived. And yet they are all alive and well, which is the best evidence.

● And the difference between "day" and "night" is really small in modern times, because if you take a plane to "America" at night in China, it's "day" there. If you take a plane to "America" at night in China, and it's "daytime" there, are we going to sleep or are we not going to sleep? And we all have "lights" and spend most of our time "indoors", etc.

What about the body?

So what is the body's default "biological clock"? How do we optimize our work and rest time?

● You just need to do a small experiment you will know: when you take a day and night to watch "serials" for "all-night", and wait until 6:00 am to start "sleeping", you will end up at 12:00 pm. Finally you will be in the afternoon 12:00-14:00 natural "wake up" over. At this point, you just have to count the hours of sleep and you will know: exactly 6-8 hours. Do you think this is a "coincidence"? Why doesn't it follow your long-standing "wake-up" time of 7-9am?

●So: the default "sleep time" of the "biological clock" is to "wake up" 6-8 hours after going to bed; and when to "go to sleep" is not a matter of time. When you "sleep" is not the most important thing. And as long as you "sleep", those "physiological activities" that will happen after sleep will still be carried out, or in other words: as long as your "sleep time" is enough, no matter when you start to sleep, it won't be a problem. As long as your "sleep time" is sufficient, no matter when you start to sleep, it will not affect your "physical health"; and "work and rest time" is just a "habit", which can be changed at will. Of course, it takes time for a new habit to develop, usually 3-6 days, so it's best not to alternate habits too often.

● so that we can "rest assured" to carry out a variety of "overtime" or "night shift" activities, otherwise there will always be some sort of "psychological barrier". Otherwise, there will always be a certain "psychological barrier", and that's not good.

● From the "full set of civilization X-files"

[edit]Other judgments on the optimal sleep time

General sleep time:

1. Normal people sleep 8 - 10 hours.

2. Time for beauty sleep 10 pm - 2 am.

3. long stay up ...... even if there is a full 8 hours of sleep, a few years down the road will be prone to endocrine disorders, physiological clocks will be messed up

4. children are best to go to bed before 8:30 p.m., because of the need to grow the body of the biological clock

5. teenagers should be in the night 10:00

6. As for those who love beauty, they should go to bed before 2:00 a.m. (it is best to go to bed before 12:00 a.m.) because the skin metabolizes before 2:00 a.m.

7. The old people should go to bed between 9:00 p.m.

and 10:00 p.m. It is better to sleep at night.

And: 12:00 pm must go to bed, everyone's body has a physiological clock, at different times to assume a different physiological mission, do not easily ignore Oh!

Physiological clock description:

1. 00:00 - 01:00 shallow sleep - dreamy and sensitive, physical discomfort is easy to wake up at this time pain.

2. 01:00-02:00 detoxification period - this time the liver to eliminate toxins and vigorous activities, the body should be allowed to enter the sleep state, so that the liver can complete the role of metabolic waste.

3. 03:00-04:00 Dormant period - the most likely time for patients with serious illnesses to develop, there are often sick people die at this time, it is best not to stay up more than this time.

4. 09:00-11:00 Essence period - this is the best time for concentration and memory, and the best time for work and study.

5. 12:00-13:00 Lunch break - it is best to sit quietly or close your eyes to rest before eating, midday can not drink alcohol, easy to get drunk and hurt the liver Oh!

6. 14:00-15:00 Peak period - the ultimate time for analytical and creative minds to shine!

7. 16:00-17:00 Low Tide - a period of physical exhaustion, it is best to supplement the fruit to relieve the cravings, to avoid obesity due to hunger and gluttony.

8. 17:00-18:00 Loose period - at this time the blood sugar slightly increased, the sense of smell and taste is the most sensitive, it may be worthwhile to prepare the evening meal to boost the spirit.

9. 19:00 - 20:00 Transitional period - it is best to go for a walk or take a shower 30 minutes after the meal to relax and relieve the fatigue of the day.

10. 20:00-22:00 Night Study - This is the peak time for evening activities, and it is recommended that you make good use of this time for deliberations, studies, and other activities that require careful thought.

11. 23:00-24:00 Night Sleep - After a busy day in town, this is the time to relax and go to sleep, don't overload your body, it's not worth it!