Because 12 years old is the time to grow up and need nutrition. If you diet or eat less, it may affect your physical development!

So usually eat less sweets and high-fat things, and eat more vegetables and tasteless things! With proper exercise, it is good to walk quickly. Half an hour after dinner, walk outside for half an hour!

As long as you persist for a period of time, the effect is obvious!

PS: If your legs are thick, you must do some stretching exercises and press leg press after exercise, which can beautify the leg lines and prevent the calves from getting thicker!