Childhood if you want to make the legs grow, to strengthen the diet calcium supplement and appropriate exercise, and some leg ligaments, muscle stretching exercises can help the legs grow long, teenagers like running, jumping high, playing basketball, playing soccer and other sports, all help the growth and development of legs. The length of the leg mainly depends on the development of the long bones of the leg, for example, the long bones are difficult to develop in adulthood, and the two ends of the long bones are called epiphyses in early childhood, and the components of the hyaline cartilage are called epiphyseal cartilage in early childhood, and the epiphyseal cartilage will continue to divide, proliferate and ossify through the intake of nutrients, and the stimulation of sports and exercise, so that the bones continue to grow longer. After the adult epiphyseal cartilage ossification backbone and epiphysis fused into one, so it is difficult to grow again after adulthood.