For me exercise does suppress the urge to eat sugary things. I don't know if it's subconscious or just how my body reacts but on days when I have good exercise, especially long runs I feel less urge to have sugars and more urge to eat chicken, cheese etc.

It doesn't really suppress the urge to eat though. Unfortunately I had to learn the hard way that I must count my calories, I have been counting them for 15+ years now and it has become part of my life.