Whenever the holiday comes. Have children already thought about how to spend this holiday? You may follow your parents to travel: or to various training courses: or stay at home to surf the Internet and watch TV. But for those children who like to stay at home to surf the Internet and watch TV, they must master a degree, not too long to surf the Internet and watch TV every day, and not to meet the momentary desire to stay up all night. Since ancient times there is a folk saying that “the doll who can sleep grows”, which has some scientific truth. This is because the growth of people is mainly related to growth hormone, and the peak of human growth hormone secretion is at night when sleeping, its secretion is three times more than during the day. Usually, after going to sleep, the secretion of growth hormone starts to increase gradually, reaching a peak at around 12:00 at night and gradually decreasing after 5:00 in the morning. If you stay up late on the Internet or watch TV for a long time during the holidays, it will definitely affect the secretion of growth hormone. If the other bases of your body are similar. It is likely that after one or two years. Their height is significantly lower than their peers who sleep early. So we recommend: not only to go to bed early every day, but also to ensure the quality of sleep. In addition, behaviors such as watching stimulating TV before bedtime, doing strenuous exercises to overexcite the brain, eating before bedtime to raise blood sugar levels, etc., will inhibit the secretion of growth hormone. All will inhibit the secretion of growth hormone, so children should try to avoid it.