You are not good at sports. Run 1000 meters every day, get quick results and lose weight. It's the simplest, and it doesn't cost money, and there is no requirement for the venue. Slowly add a lot, and then two or three thousand can be used.
The healthiest way to lose weight is to keep your mouth shut and open your legs. It's naive to think that God will take your flesh.
I don't want to exercise, I want to lose weight, I don't want to exercise, I want to improve my sports performance. What is something for nothing? Have you told me, how can you consume fat without exercise? 13 years old. Why? 13 of the age is right to ask such a naive question. If you think pasting and copying is more convincing, why do you ask yourself? I'm not interested in your grades, but at least don't take diet pills. At your age, taking them may affect your development.