Take a nap immediately after dinner. At this time, a large amount of blood flows to the stomach, blood pressure drops, and oxygen supply and nutrition to the brain drop significantly, which will cause insufficient blood supply to the brain, and in severe cases, reflux esophagitis may occur. Don't eat too much or too greasy at lunch, and exercise 10 minutes to digest food before taking a nap; It is most appropriate to rest for about 20 minutes before taking a nap.

In addition, during sleep, muscles relax, heart rate slows down, blood vessels dilate, blood pressure drops, and blood flowing into the brain is relatively reduced. Especially after lunch, more blood enters the gastrointestinal tract. At this time, if you sit and sleep again, your brain will be deprived of oxygen for a long time, which will make people feel uncomfortable, such as top-heavy, fatigue and weak legs. Sleeping on the table will oppress the chest, hinder breathing and increase the burden on the heart and lungs.

It is advisable to take a nap on the right side, because it can reduce the burden on the heart, increase the blood flow in the liver, and be beneficial to the digestion and metabolism of food. However, due to the short nap time, you don't have to force yourself to lie to the left, lie to the right or lie on your back, as long as you can lie down and fall asleep quickly.

Extended data:

The nap time should not be too long, preferably within 1 hour. Physiological research shows that human sleep can be divided into two stages: shallow sleep and deep sleep. Usually, after we fall asleep for 80~ 100 minutes, we gradually change from shallow sleep to deep sleep. In the process of deep sleep, the inhibition process of brain center is obviously strengthened, many capillary networks in brain tissue are temporarily closed, cerebral blood flow is reduced, and the metabolic level of the body is obviously reduced.

If people suddenly wake up in the deep sleep stage, because the deep inhibition process of the cerebral cortex can't be released immediately and the closed capillary network can't be opened immediately, it will inevitably lead to temporary blood supply deficiency in the brain and temporary disorder of autonomic nervous system function, and the human body will feel very uncomfortable.

And this kind of daze discomfort will last for about 30 minutes before it gradually disappears. Therefore, the longer you take a nap, the more tired you wake up. Therefore, the nap time is not as long as possible, but should be within 1 hour, which can effectively eliminate fatigue and not wake up from sleep.

People's Network-Take a nap immediately after meals, and be careful of stomach trouble! Taking a nap is also a technical job.

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