My point being that if you don't alter your diet, but add exercise that burns 4000 of the calories you have eaten, most people with some fat to burn would lose over a pound a week like that. Or not put on a pound, depending on how much they are eating.
How anybody can say that is not worth it is beyond me. The numbers seem to add up fine. Nobody ever said that losing weight was a cakewalk, but if 5 hours of exercise a week is too much for someone to bother with, then they are just plain lazy, assuming of course that they are physically capable of doing 5 hours exercise a week.