I walk a lot, exercise a lot, but whether I have a (small) belly or not, is almost fully determined by my eating habits.
Not to mention that there is a vicious cycle at work. Once you are heavy enough, physical movement becomes very unpleasant, especially in hotter climate (American Deep South, Mexico).
But even though the US really leads the heavy charge, other countries are catching up. I believe we (Central Europe) are like 25 years behind you, but following. And there are sidewalks everywhere here.
Not to mention that there is a vicious cycle at work. Once you are heavy enough, physical movement becomes very unpleasant, especially in hotter climate (American Deep South, Mexico).
But even though the US really leads the heavy charge, other countries are catching up. I believe we (Central Europe) are like 25 years behind you, but following. And there are sidewalks everywhere here.