1, skip. Because junior high school students don't have tough economic strength, they can't choose more expensive exercise methods, so they can only try to choose some relatively simple and easy-to-operate exercise methods. Skipping rope is one of the typical exercise methods. You only need to have a good quality rope and keep exercising between classes. The effect of stovepipe is still obvious, and skipping more rope will help you grow taller.

2, running stovepipe. Every school has some basic fitness equipment and playgrounds can be seen everywhere. This kind of free resources is very suitable for junior high school students. Friends can usually go to the playground for proper running after class, which can play a certain slimming effect, but it should be noted that running should be moderate and not overworked, otherwise it will easily lead to excessive tension of leg muscles, which is a very bad state and will only lead to a large number of proliferation of leg muscles.

3, pay attention to diet. Since you want thin legs, you should pay attention to your diet. Although junior high school students are still developing, they should also pay attention to their diet. The so-called attention is not to let you control your diet, but to eat more nutritious food, such as some fast-food junk food, and don't touch it casually. You can eat more nutritious and healthy foods such as milk and eggs, but you should also pay attention to the amount, not too much.