It is popular belief that crunches develop your ab muscles but that without cardio, no matter how big ab muscles get, you won't be able to see them.
However, here's my question:
If muscle burns more calories and fat even while resting, wouldn't the mere fact that you are developing your ab muscles through crunches help you burn more calories and fat, and with a proper diet, wouldn't it help in reducing even more fat, thus making your abs visible at some point, even without any cardio?
I know cardio is a much better option, but isn't it a myth that you can never see your abs if you don't do cardio? Doesn't it work the same as other muscles? (The more you work them, the more they grow, displacing the fat in the area and therefore allowing you to see them?