This is very true. Exercise has more of an effect than the calories burned. It improves your health and you feel much better than when you had a sedentary life. As always the answer is that decreasing calorie consumption with moderate exercise is key to maintaining weight loss.<p>Just as exercising cannot offset massive overconsumption of food, massive underconsumption of food will make one that is dieting feel terrible, and thus not as likely to continue.<p>In addition the amount of exercise done is never going to really offset a sedentary job. Someone walking on their feet all day vs me being at a desk is going to consume much more energy than me even if I workout after work intensely for an hour. So I am still going to need to consume less than them. But if I did not do the hour of exercise, my body would break down from not being used, and my overall feeling of health would decline.