In the 2 1 century, children are the most important members of every family. "If you hold it in your hand, you will be afraid of it, but if you hold it in your mouth, you will be afraid of it." This is the truest portrayal of most families in China. With the improvement of living standards, it also brings a certain load to children's physical quality. Obesity, inactivity and hunchback have become the real health problems of children in some families, and the physical condition of children has also become the most concerned topic for every parent. In order to make children's physical fitness develop in an all-round way and get more exercise, the popularity of various children's fitness classes during the holidays can be proved. Similarly, children's physical fitness coaches related to children's physique also have a bright future, so the salary of children's physical fitness coaches will not be lower than that of ordinary fitness coaches. Because in a family, the money spent on children is always higher than that of adults, children's physique is an educational investment that can improve children's physique, and parents are willing to pay for it. At the same time, it should be noted that parents are definitely unwilling to choose low-quality coaches for their children's health and safety, so the requirements for children's physical fitness coaches are not low, and it is not a simple matter to become excellent children's physical fitness coaches.