16 30 push-ups are too few, but I have 16, and I have developed 4 abdominal muscles. Form the fifth and sixth blocks, and do sit-ups at most three times a day 100. Better do it twice. Do 60 push-ups three times a day There is another way, I will do it but I won't say it. That's all. Keep practicing. After a long time, I will keep six abdominal muscles.