No matter what kind of exercise, how much body fat you have can exercise. But if you really have a lot of abdominal muscles and don't want to exercise all over your body and your legs get thicker, you can only do sit-ups or belly rolls, that is, do some abdominal-related exercises. However, even if you insist on doing this kind of exercise, other parts of your body will be thinner, but it is better than running without muscles on your legs ~ ~ If you want to lose weight in one place, you need to insist on exercising in only one place.