Excessive naps can increase the risk of Alzheimer's? Reminder: nap time needs to be controlled within this range

As early as 1986, there has been investigation and research on naps. The original research project was to explore the rhythm experiments of human sleep and awakening, and to explore the mystery of human sleep.

　　The results show that a person can only stay awake for about 3 hours at a time , which means that after 4 hours , you will feel tired and sleepy.

　　In a day, there are two time periods that are most prone to sleepiness, which are 1-4 o'clock in the afternoon and 1-4 o'clock in the morning.

　　1-4 am is the most natural sleep rhythm for human beings. Most people fall asleep before 11 am, so this sleepy period is very easy to pass. But it is different in the afternoon from 1-4 o'clock, most of the people are working and studying at this stage.

　　The reason why it is easy to feel sleepy from 1-4 pm is because after a morning of exercise, the body has fallen into a state of exhaustion . After lunch, a large amount of blood is supplied to the stomach to digest and absorb food , and the blood supply to the brain is relatively small, so it is very easy to feel sleepy. Therefore, from a clinical point of view, nap is also one of the physiological functions of the human body.

　　Taking a nap is like recharging the human body. It can improve the efficiency of people's work and study in the afternoon, and also relieve the fatigue of the morning. Even related research and investigations show that naps can also protect the heart, enhance memory, increase immune function, and relieve anxiety . However, this does not mean that longer naps are better for your body.

　　You must know that human sleep is carried out according to cycles, that is, the non- rapid eye movement period and the rapid eye movement period , which constitute a complete sleep cycle. If the nap time is too long, it is not only easy to sleep more and more sleepy, but also has many problems such as dizziness and difficulty concentrating after waking up. At the same time, it will also affect sleep at night, eventually forming a vicious circle.

　　Not only that, but studies have shown that taking too long naps may increase the risk of Alzheimer's!

　　The study comes from a research team at the University of California, USA, who published a research paper in Alzheimer's & Dementia .

　　The paper conducted a comprehensive analysis of nap time and frequency among 1,065 older adults, with an average age of 81 . The results showed that the risk of Alzheimer's disease was about 40% higher in the elderly who took a nap for more than one hour compared with those who took a nap for only one hour .

　　The study also showed that long-term naps of more than 60 minutes may also increase the risk of cardiovascular disease by 34%. Therefore, although taking a nap is clinically beneficial, for the sake of health, you should control your nap time.

　　As for the optimal nap time, it varies from person to person. Different groups of people have different nap habits, but from an overall point of view, the nap time should be controlled within 40 minutes, and the best time is 30 minutes. .

　　Finally, I would like to remind everyone that not everyone is suitable for naps. Especially for people with problems such as insomnia and poor sleep quality, if they choose to take a nap or take a long nap at noon, it will affect the nighttime sleep rhythm, aggravate insomnia, and even form a vicious circle.

　　Therefore, whether to take a nap or how long to control the nap time depends on personal circumstances.