Learn more about fitness and you will learn two things. 1. It is impossible to lose weight by any exercise. Fat has decreased in the overall proportion. 2. Sit-ups are wrong actions, and professional bodybuilders will not do sit-ups, because sit-ups exercise the same muscles that lift legs, which have a weak effect on abdominal muscles and will also hurt the spine and lumbar vertebrae, which is very harmful to the elderly. If you are obese and have a fat belly, swimming is the best, followed by jogging. The practice is: reduce the greasy diet moderately but don't go on a diet. Do aerobic exercise (jogging or swimming) for more than half an hour every day. If you are heavy, you can't train running. If your weight is normal, running is the best. The optimal heart rate is controlled between 140 and 160. 1~3 months can lose weight. If you are not fat, but your stomach is fat, it is usually caused by endocrine problems. You need to check your eating habits and don't stay up late. At the same time, recuperate the body. If you go to the hospital, you can get more professional help. As for strength training, it is also helpful to reduce fat. Because muscles consume energy. Your introduction should be a woman, practicing pectoralis major (push-ups, etc. ), quadriceps femoris (squat, etc. ), gluteus maximus (squat, etc. ), rectus abdominis (abdomen, abdominal muscle tears, etc. ), these four muscles have the most obvious shaping effect on women.