Adequate sleep, exercise and nutrition Spring is the fastest growing season for children and adolescents. The height increase in the three months from March to May is 2 to 2.5 times higher than the height increase in the three months from September to October. Therefore, in spring, parents should promptly urge their children to work and rest on time, enhance exercise and increase nutrition. The reasons why spring is good for growth: 1. The human body has a strong metabolism in spring, blood circulation is accelerated, respiratory and digestive functions are enhanced, endocrine hormones increase, especially the secretion of growth hormone increases, which is beneficial to growth. 2, spring exposure to sunlight increased, the sun’s ultraviolet light can stimulate the growth of bone marrow, so that the red blood cells increase, which is conducive to the body to carry oxygen and accelerate the tissue metabolism. In addition, vitamin D in food and vitamin D in human skin, only after ultraviolet radiation, can finally be converted into hydroxylated vitamin D, the latter can promote the absorption of calcium and phosphorus in the stomach and intestines, so as to provide sufficient calcium and phosphorus for the growth and development of bones. 3, spring outdoor activities increase, exercise can produce benign mechanical stimulation of the bones, to promote bone growth.