NAP is good for health, healthy living

From a physiological point of view, the human brain cells in the excitement can generally last 4-5 hours, and then into a suppressed state. Especially after lunch, the digestive tract blood supply significantly increased, the brain's blood supply is significantly reduced, resulting in the blood flow into the brain oxygen and nutrients are also reduced, so the body's biological clock a sleep rhythm, so that people have a feeling of lassitude, sleepy. At this point, the body needs to be adjusted for a short time to eliminate fatigue, restore physical strength, and stabilize the balance of nervous system function. So, how to do a scientific nap?

First of all, nap time should not be too long, preferably within 1 hours. Physiological studies show that human sleep is divided into two stages of shallow sleep and deep sleep. Usually, after 80-100 minutes of sleep, people gradually turn from shallow sleep to deep sleep. During the deep sleep process, the inhibition process of the brain centers is obviously strengthened, many capillary networks in the brain tissue are temporarily closed, the cerebral blood flow is reduced, and the body's metabolic level is significantly reduced. If people wake up suddenly in deep sleep, and the deeper inhibition in the cerebral cortex cannot be lifted immediately, the closed capillaries

Nets can not be immediately open, it is bound to cause a brain to have a lack of blood supply, plant nervous system function of temporary disorder, the body will feel very uncomfortable. This discomfort is about to last about 30 minutes before it fades away. Visible, nap time is not the longer the better, but should be within 1 hours advisable, so as to effectively eliminate fatigue, and not to sleep too heavy and not easy to wake up.

Secondly, it is not appropriate to take a nap immediately after meals. Because the stomach is full of undigested food after lunch, lying down immediately can cause a feeling of fullness. The right thing to do is after lunch, do some minor activities, such as walking, rubbing belly and so on, and then take a nap, which is conducive to digestion and absorption of food.

Third, pay attention to sleep posture. It is often seen that some people nap while napping on a chair or couch, while others simply lie on the table and sleep. In fact, these practices are not scientific. In the sleep state, the body relaxes, the heart rate slows, blood vessels dilate, blood pressure drops, and blood flow into the brain decreases. Especially after lunch, more blood into the gastrointestinal, at this time if sitting again sleep, the brain will have a long period of hypoxia, causing a person to produce head weight, fatigue, leg soft and so uncomfortable feeling. and lying on the table to sleep, will oppress the chest, hinder breathing, increase the burden of heart and lungs. It is generally believed that sleeping posture is good because it can reduce the burden of the heart and increase the blood flow of the liver, which is beneficial to the digestion and metabolism of food. But in fact, because the nap time is shorter, you can not be forced to sleep on the left, right, supine, as long as you can quickly sleep on the line.