From the physiological point of view, the human brain cell excitability in general can last 4 ~ 5 hours, then it would turn into an inhibitory state. Especially after lunch, significantly increased blood supply to the digestive tract, decreased blood supply to the brain, causing blood flow to the brain with oxygen and nutrients are reduced accordingly, so the body's biological clock once in sleep rhythm, gives rise to lethargy , sleepy feeling. At this point, the body needs a short period of adjustment, to eliminate fatigue and resume physical strength, stability, balance function of the nervous system.
"Nap" is the most experts recommend a "healthy lifestyle", not only significantly boost the immune system, can rapidly release fatigue, mood and energy to do still better.
Spain's shop, every 14:30 to be closed and re-open until 5 o'clock this evening. Spaniards participated in the original "National nap movement" would definitely have 2 a day and a half hours so that everyone take a nap.
In the U.S., "study nap" has become the latest fashion, many companies are expressly provides that encourage employees to take a nap in the afternoon, to take this spirit, more work to meet the afternoon.
3 big advantage afternoon nap
1, higher immunity
Immunology experts say, after lunch, to help digestion, the body will be automatically changed by the parasympathetic dominant, then sleep a short sense, can be more effectively stimulate the body cells, enhance the activity of immune cells.
2, heart stronger
Spanish Medical studies have shown that napping for 30 minutes a day, more balanced hormone secretion, cardiovascular disease incidence can be reduced by 30%.
3, feeling more comfortable
Harvard University psychologist wrote a report, published in the latest "Nature Neuroscience" journal, content display, the afternoon nap can improve mood, reduce body tension, relieve stress - effect of sleep a night like ( 8 hours).
So, how do scientific manner na
First of all, nap time, not too long, preferably within 1 hour.
Physiological studies show that human sleep, light sleep and deep sleep stages. Typically, people sleep 80 to 100 minutes, then gradually turn into deep sleep by the light sleep. In deep sleep, the brain center of the inhibition of all significant strengthening of brain tissue temporarily shut down many of capillary network, blood flow decreased significantly reduce the body's metabolism. If people suddenly wake up in the deep sleep stages, due to deep cerebral cortex inhibition is not immediately removed, close the capillary network can not be opened immediately, there is bound to cause a transient cerebral insufficiency, autonomic nervous system function appears temporary disorder, the body will feel very uncomfortable. This does not feel about about 30 minutes before to gradually disappear. Shows that the longer the nap time is not good, but should be within 1 hour is appropriate, it can effectively eliminate fatigue, not that bad sleep too difficult to wake up calm.
Second, immediately after a meal should not take a nap.
Do not sit down or lie down immediately after a meal, should stand for 30 minutes, during which can wash dishes, cut flowers, like pruning. And then go downstairs for 30 minutes, help digestion,. Asleep before the best 30 minutes of sleep, many of my friends said, nap End head hurt. However, still sleepy sleeping finished, the first Youteng sleep, because you sleep too long, caused by brain hypoxia. Because the stomach is full after lunch not digest food, then immediately lie down lead to the sense of fullness. Correct approach is, after lunch, first do some light activities, such as walking, Roufu so, and then take a nap, so that is conducive to digestion and absorption of food.
Third, pay attention to sleeping position.
Nap time can often see some people sitting in a chair or sofa nap, some people just lying on the table to sleep. In fact, such practices are not scientific. The human body during sleep, muscle relaxation, slowed heart rate, blood vessels expand, blood pressure lowering, reduced blood flow into the brain. Especially after lunch, more blood into the gastrointestinal tract, this time sitting Ruozai sleep, the brain over time become starved for oxygen, gives rise to the first weight, fatigue, legs were feeling so unwell. While lying on the table to sleep, the chest would be oppression, obstruct breathing, increased heart and lung burden. Generally believed that sleeping with the right lateral position is better because it can ease the burden on the heart, liver, increase blood flow, help food digestion and metabolism. But in practice, shorter nap can not be forced to sleep in the left, right, supine, as long as the rapid fall asleep on the line.
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