I am a boy, too. Personally, I don't advocate taking medicine to lose weight, which is bad for your health! My personal practice is to put my arms up, like doing chest expansion exercises, and then twist them. To put it bluntly, it is the combination of chest expansion and body rotation, but the general body rotation is mainly aimed at the whole body, and long-distance running is effective for reducing fat, but it has little effect on waist fat. I started by running every day and doing sit-ups at night. As a result, I really lost weight, but I always insisted on doing it in the above way, and the effect was very good. Focus on persistence! ! This method was invented and practiced by myself! You can try. I wish you a successful slimming as soon as possible!