There is a saying called "don't sleep at noon, collapse in the afternoon". With the rising temperature in summer, it is easy to make people drowsy. So for many working people, they like to squint a little at noon. What are the benefits of a nap? How long is the best nap?
The benefits and necessity of siesta
1. Reduce blood pressure
According to a new study by researchers from Allegheny college in the United States, if work pressure makes people's blood pressure rise, you can take a nap for a while, which will help reduce blood pressure.
2. Protect the heart
According to a Greek study, a 30 minute nap at least three times a week can reduce the risk of sudden death from heart disease by 37%; there is also evidence that the incidence of coronary heart disease is much lower in countries and regions that have the habit of taking a nap than in countries that do not. The researchers believe that this may be due to the relaxation of the cardiovascular system and the reduction of human tension. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/jiankang.html)
3. Enhance memory
American researchers have found that napping can significantly improve energy and alertness, while a study from the University of Dusseldorf in Germany shows that napping can not only eliminate fatigue, but also improve memory.
4. Improve immunity
Sleep experts at the German Institute of psychiatry found that 1:00 noon is a clear peak of sleep during the day. At this time, a short sleep can effectively stimulate the body's lymphocytes and enhance the activity of immune cells. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/jiankang.html)
How long is a good nap?
Time should not be too long, 10-30 minutes or so.
Human sleep is divided into two stages: light sleep and deep sleep. Generally, after sleeping for more than 30 minutes, people go from light sleep to deep sleep. At this time, the inhibition process of central nerves in the brain is deepened, many capillaries in the brain are temporarily closed, the blood flowing through the brain is relatively reduced, and the metabolism process in the body is gradually reduced. If people wake up at this time, they will feel uncomfortable and sleepy.
This is due to the inhibition of the cerebral cortex has not been removed, the closed capillaries have not been opened, the brain appears a temporary relative lack of blood supply, resulting in a temporary autonomic nerve dysfunction, which can be more than 10 minutes short, more than half an hour long before the symptoms disappear. This symptom is the biggest drawback of going to bed and taking a nap. Moreover, going to bed for a nap often takes a long time to fall asleep, which increases the anxiety in the heart. What's more, because the noon nap time is too long, but can't sleep at night, which will lead to insomnia seriously. Over time, it will form a vicious circle and destroy the normal biological rhythm of the human body.