Because you're still growing. I don't know if it's MM or GG. To lose weight is to eat less and exercise more. It will lead to low nutrient intake, and you don't want your chest to be undeveloped or not tall. After that, it can't grow any longer. Exercise, jogging and swimming are all good in summer ~ Don't sprint, your legs will become thicker and muscular, and you will die ~ ~ That's what your aunt has suffered ~ Now occasionally touch this sturdy calf and meditate. ...

Please accept it, thank you!