I know that exercise doesn't make that much of a dent in the overall obesity epidemic by itself, but I wonder how much of just exercising influences one's diet.

I know that exercise doesn't make that much of a dent in the overall obesity epidemic by itself, but I wonder how much of just exercising influences one's diet. For instance, if I run 3 miles today, am I more or less likely to eat a salad for dinner? Or a pizza? Am I more likely to watch my diet if I'm exercising, or am I more likely to splurge? Is there a trend in either direction? If exercise influences diet positively, then this is absolutely worth it. If it doesn't affect diet at all or if it affects diet negatively, then that's another story. While exercise is great in and of itself, it doesn't solve an obesity epidemic. Even people who exercise every day can have cardiac problems if they don't eat well.