Comment by pfranz

From what I've seen and experienced the act of exercising suppresses my appetite. I can't eat a big meal and immediately work out. If I'm a little hungry a few minutes into working out I'm not. But hours later or the next day I'm famished and will eat more. It's like a different kind of hungry--more of a craving.

I think moderate exercise can help with getting used to not over-eating. More strenuous exercise seems to make the body crave larger meals often negating any calories burned.