Why do you want to sleep when you are in the car

　　Have you ever had this kind of experience: you want to sleep as soon as you take a car, whether it is a car, bus or train, whether it is a ten-minute journey or a ten-hour journey, no matter whether the road is flat or bumpy, as long as you get on the car, it is like eating. Like taking sleeping pills, you can fall asleep in minutes. What exactly is this for?
　　Have you ever had this kind of experience: you want to sleep as soon as you take a car, whether it is a car, bus or train, whether it is a ten-minute journey or a ten-hour journey, no matter whether the road is flat or bumpy, as long as you get on the car, it is like eating. Like taking sleeping pills, you can fall asleep in minutes. Sometimes I even feel that I am not sleepy before getting in the car, but I will still fall asleep unknowingly when I get in the car. What exactly is this for?
　　Why people want to sleep
　　 First of all , let’s talk about why people want to sleep.
　　 In fact, this is because of a substance in our body-adenosine. It makes our body feel tired, so it is also called “fatigue factor”. The longer a person works and studies continuously, the more adenosine will be produced in the body, which will gradually reduce nerve activity and excitement, making people more and more sleepy, so as to achieve the purpose of regulating sleep .
　　 On the contrary, when a person is asleep, the brain will constantly eliminate the “fatigue factor” and rejuvenate the person. If the person is still awake and busy with work and study during the day, the brain will temporarily suppress adenosine.
　　Why do you want to sleep when you are in a car? There are many people who feel sleepy when they are in a car
　　 during the day . Why can’t they restrain their fatigue and want to sleep?
　　 First of all, there is not much space in the car, and the range of people’s activities is limited. Whether it is a long-distance bus or a small car, for safety reasons, people sitting in the car can only sit in their seats most of the time and have nothing to do. Reading and playing with mobile phones will not only make the eyes more and more tired, but some people will also get motion sickness.
　　 At this time, what people do most is to empty their brains. The brain finds that its workload is reduced, and the enthusiasm for work is also reduced, and the secretion of adenosine in the body will increase. In addition, the air in the car is not well circulated, the body’s blood circulation and respiration are weakened, and the body will become more and more exhausted. Getting tired and wanting to sleep.
　　 Secondly, unlike the noisy noise in other public places, the driving car is a relatively neither quiet nor noisy environment, similar to the feeling of listening to a lullaby. Especially accompanied by the roar of a car engine, this sound is similar to white noise (equivalent to a kind of background music), its low-frequency vibration is close to the frequency of brain wave activity when sleepy, and can gradually induce the brain to discharge at the frequency of “falling asleep” .
　　 Finally, the vehicle has been in different degrees of vibration and bumps during driving, which will not only prevent people from dozing off, but even help them sleep. I believe you must have seen such a scene in your life: the mother will gently shake and pat the baby in her arms to make it fall asleep quickly, but once the baby is suddenly transferred to the bed, the baby will wake up and cry immediately. Some scientists believe that this may be similar to the feeling of people floating in the amniotic fluid of the uterus in a small area before birth, and the bumps of the car are also the same. Such slight vibrations will affect people’s brain waves and increase drowsiness.
　　Sleeping in the car is harmful to the body. It is
　　 worth mentioning that although sleeping in the car can give the body and brain a temporary rest, it may also cause some harm. This short break may make the body more tired.
　　 I don’t know if you have such an experience. After taking the high-speed rail for ten hours to go home, I slept all the way, but I felt so tired after getting off the bus, like I just finished a marathon. Hours. This is because when in a shaking environment, the human body will still maintain balance unconsciously, and will not get real relaxation. It is just in a light sleep state, and the sleep quality is relatively low, and the more you sleep, the more sleepy you will be. Therefore, sleeping in a car is not a good way to rest, it is at best a way of hypnosis.
　　 In addition, if the temperature of the air conditioner is relatively low when riding in a car, the pores of the human body are open when sleeping, and cold air invades the body and it is easy to catch a cold. Moreover, the space in the car is limited, the body cannot be stretched well when sleeping, and the lack of blood circulation can easily lead to numbness of the limbs.