Do more than 100 sit-ups every day for half a month. What's the effect? How long can you have obvious abdominal muscles?

? Half a month won't have much effect. The most important thing is persistence. You can't fish for one day and dry the net for two days.

And pay attention to diet, eat less high-protein food and drink less carbonated things.

This is my muscle. I hope it helps you. Hope to adopt,