Walk as many steps as possible on the way to and from work every day. Walking posture is very important, chest out, abdomen in, hip in, never hunch over. If you don't tighten your lower abdomen when you walk, no matter how many roads you walk, you can't stimulate your abdominal muscles and your lower abdomen won't contract. In addition, hunchback will destroy the sense of balance of the body and reduce the exercise effect of walking.