If you want to develop abdominal muscles, you can also start with full-body exercise. It is a good choice to lose weight by running first. After the fat content is relatively low, you can carry out special sports in abdominal muscle training. Try to exercise for about half an hour every day. You can do some sit-ups and lift your legs by abdominal muscles. If you don't know exactly what to do and how long it will take, you can download an exercise and fitness App, such as keep and fit, which are good choices for losing weight and fitness.
In addition, before going to bed every night, you can practice lying flat on your legs, leaning against the wall for half an hour, and then doing flat support for a certain period of time. It may be difficult at first, and it won't last long, but it doesn't matter. As long as you stick to it every day, the abdominal muscles and vest line will be just around the corner. Exercising abdominal muscles is a long-term thing. As long as you persist, it will be effective.