It has a certain effect, combined with massaging the center point of the knee back, lying on the bed, putting your hands on your side, straightening your legs horizontally and then lifting them to the position perpendicular to the bed surface for more than ten times. Then put one leg on the other leg and repeat the above actions, and then repeat with the other leg. Do dozens of bicycle pedal movements when lifting your legs, and stick to it for a long time, not to mention stovepipe, even abdominal fat will disappear. Wish you success!