Hello, you can try the following exercises: sit in a chair with your body at 90 degrees to your thighs and sit up straight. Put your hands on your thighs and grab the edge of the chair. Exert your stomach, count to five slowly, and try to lift your knees to your chest. Pause at the highest point, and then slowly put down your body at a speed of slowly counting to five. The effect of this action can eliminate abdominal fat and tighten abdominal muscles. But be careful, your hands don't need to be hard, just put them on your thighs easily. Moreover, the body can't lean on the back of the chair, and you must be able to clearly feel the stomach exerting force. Do this action according to your own ability, but it is best to work in groups of at least six people at a time without interruption. You can take a break and repeat a group, and then increase it slowly. If not, you can consult a regular plastic surgery hospital to see what others have done. I wish you good health!