The day before yesterday (8/6), I did crunches for continuously 10 minutes, and the next day, which is yesterday (8/7) when I woke up, I found that a layer of my fat disappear. By "disappear", I mean "not visible anymore" or "can't be felt", not really "disappear", because fat cells never really disappear. When I measured my waist size, I found that it is almost the same as the day before yesterday, before doing crunches for 10 minutes. However, when I pinched my skin on the belly, I found that there are less fat and more muscles.
I must admit that I was quite happy at that time, and I believed that if I just keep doing crunches and abdominal exercises, I can get abs soon. So yesterday (8/7), I did the same thing I did on the day before yesterday, I did crunches and reverse crunches for a long time without stop. And today when I woke up, I found that the situation on my belly is like yesterday, almost same waist size, less fat and more muscles. It is certainly better than before, but no big change from yesterday.
"today when I wake up, I found that a layer of my fat in my belly has disappeared" I don't think that's what happened. It's much more likely that your abs are just swollen from doing so many crunches, and are temporarily a little more prominent. Body fat changes occur much too slowly to be able to see changes overnight. - David Scarlett
Is that true? What happened to my belly? Is it really like what I'm told in the comment, that my abs are just "swollen"? And if I keep doing crunches continuously for a long period of time, will I get six-packs?