It is not good for the body, sleep metabolism will slow down, and the food just eaten will not be digested, so that not only the heat of food will accumulate in the body and lead to obesity, but also it is not good for the stomach and gallbladder, which will lead to stomach problems in the long run! ! ~ ~ ~ So people often say, "Walk a hundred paces after a meal." First of all, pay attention to your sleeping position. It is suggested that the school find ways to increase some facilities for students to take a nap, such as simple canvas beds. Or you can put some chairs together to sleep. Really can't. It is suggested that students would rather lean back in the chair, put a small pillow around their necks, and then stretch their legs as far as possible in another chair to relax the lower body completely. This sleeping position is also better than sleeping on your stomach. Secondly, it is not advisable to take a nap immediately after a meal. Because the stomach is full of undigested food after lunch, lying down at this time will make people feel full. The correct way is to do some light activities after lunch, such as walking and taking a nap for about half an hour, which is beneficial to the digestion and absorption of food. Third, the nap time should not be too long, preferably within 1 hour. Physiological research shows that human sleep can be divided into two stages: shallow sleep and deep sleep. Usually, after 80~ 100 minutes of sleep, people gradually change from light sleep to deep sleep. If people suddenly wake up in the deep sleep stage, because the deep inhibition process of the cerebral cortex can't be lifted immediately and the closed capillary network can't be opened immediately, it is bound to cause short-term blood supply to the brain, the function of autonomic nervous system will be temporarily disordered, and the human body will feel very uncomfortable. This discomfort will last for about 30 minutes before it gradually disappears. It can be seen that the nap time is not as long as possible, but should be within 1 hour, which can effectively eliminate fatigue and not wake up from sleep. Finally, we must do a good job of keeping warm during lunch break and cover the quilt, because after falling asleep, people's body temperature is relatively low, and the cold and heat between sleeping and waking are uneven, which may easily lead to diseases such as colds.