Waist is thin: there is no meat on the stomach, but meat on both sides of the waist.
Teach you a super simple and effective method of lumbar scoliosis. Prepare a towel when you sleep at night, fold it into long strips as needed, and put it under your waist. Obviously, your waist is supported best, then your feet are straight and your big toes are rolled inward, and your arms are naturally placed on both sides of your head. Abdominal breathing lasts for 5 minutes. Do some thin waist exercise during the day, and don't do strenuous exercise such as running. I'm talking about thin local movements that are exhausting Pilates.