Your abdominal muscles are not weak, but covered with too thick sebum. So you have to increase the amount of aerobic exercise. If your body fat is not high, you can do aerobic exercise five times a week for about half an hour each time. It is best to jog at a speed of 8~ 10 km per hour.

Abdominal muscles have a high proportion of red muscles (endurance type), and you can exercise abdominal muscles every day. Don't practice push-ups every day, it won't promote muscle growth. If you want to practice like this, two or three times a week is enough.

Aerobic exercise training time, I suggest you put it before dinner or lunch. In this way, you can enter the stage of fat energy supply faster, and the effect of fat reduction will be better.

Finally, I remind you that it is best to concentrate on training within 1 hour. As time goes on, the secretion of androgen decreases, which is not conducive to promoting muscle growth.