According to research, children grow three times faster when they are asleep than when they are awake because the pituitary gland at the base of the brain secretes more growth hormone after the child falls asleep, and the role of growth hormone is to promote the growth of bones, muscles, connective tissue and internal organs. Therefore, parents should understand that sleep is not simply a need for rest, but also a catalyst for physical development. At the same time, after getting a good, sweet and comfortable sleep, the baby will also feel refreshed and relaxed, and even the whole day will be full of energy. This is because sleep is the most important external factor that affects a child’s height. Nowadays, there is no shortage of nutrition for children, and parents are paying more and more attention to exercise, but only sleep is generally insufficient. From the perspective of Western medicine, Dr. Fu Junfen, chief physician of Zhejiang Medical College of Pediatrics, said, “Growth hormone is an important factor affecting human height, and growth hormone is not secreted during the day unlike other hormones in the human body, it is secreted in a pulsatile manner, mainly at night, and the more it is secreted, the more it helps growth. Why is there such a focus on children’s sleep? Is it mandatory to go to bed by 8:30 in elementary school? This is because sleep is the most important external factor that affects a child’s height. Nowadays, there is no shortage of nutrition for children, and parents are paying more and more attention to exercise, but only sleep is generally insufficient. From the perspective of Western medicine, Dr. Fu Junfen, chief physician of Zhejiang Medical College of Pediatrics, said, “Growth hormone is an important factor affecting human height, and growth hormone is not secreted during the day unlike other hormones in the human body, it is secreted in a pulsatile manner, mainly at night, and the more it is secreted, the more it helps growth.” Growth hormone is secreted by the human pituitary gland. The pituitary gland has a lot of work to do in a day. In addition to secreting growth hormone, it also secretes sex hormones, adrenocorticotropic hormones and other hormones needed by the human body, so it is not secreting growth hormone 24 hours a day because it is “too busy”. The only exception is infancy. During infancy, the pituitary gland secretes growth hormone continuously during the day and night, so infants grow especially fast before the age of one. After infancy, the amount of growth hormone secreted during the day is very low and the secretion is mainly concentrated at night when you go to sleep. Two time periods are crucial for growing taller! Between 9 pm and 1 am the next day, especially around 10 pm, the secretion of growth hormone reaches its highest level, which can reach 5-7 times the level during the day. In addition, there is also a small peak of growth hormone secretion for an hour or two around 6:00 am. However, growth hormone does not start to be secreted in large amounts on time once it reaches 9:00 p.m. Its secretion in large amounts must have a prerequisite: it only happens when you are in deep sleep. For your child to grow taller, it is best to go to bed by 8:30 pm, no later than 9:30 pm, and get up after 7 am. So parents, pay attention and make sure your kids get into the good habit of going to bed early and getting up early!