Exercise is the most scientific way to lose weight. Through certain aerobic exercise, you can consume excess fat in the body, promote metabolism, and achieve the purpose of losing weight through exercise. Common sports include swimming, jogging, aerobic exercise and dancing. Although aerobic exercise will burn fat, it still needs to reach a certain intensity. It usually takes 30 minutes to burn fat, or at least 30 minutes to start burning fat. So be sure to keep doing aerobic exercise for 40 minutes to an hour.