The length of legs is related to genetics, nutrition, exercise and other factors. At present, children are 14 years old and usually growth and development have not yet stopped, so if you want to increase the length of your legs, you can contribute to the increase in leg length through nutrition and exercise. 1. Nutrition: Because the growth of bones need nutrients, especially protein and calcium. Normally pay attention to eat some high protein and calcium rich food, such as lean meat, fish and so on. 2. Increase the amount of exercise: usually can consider doing some sports, such as high jump, long jump, basketball, etc., in order to promote children to grow taller, so as to increase the length of the legs, in addition to the need for appropriate sun exposure, to promote the absorption of calcium. The increase in leg length requires long-term persistence, not a period of time can be significantly improved, if there are symptoms of physical discomfort, you should go to the hospital in a timely manner, consult a physician for guidance.