This has got to be the most irritating thread I have ever read in my entire life.
Generally most americans use calories to add to their beltline which is waisted
Although a human may burn calories less efficiently than an engine we also are moving much much less weight. You can't tell me bicycling takes more energy than driving a 3000lb suv, much of the food we eat is nill as it would be consumed anyway and that is the case for most of us, it is a small minority that has to eat more to sustain exercise.
We need to work harder to convert people to run on gasoline
http://auto.howstuffworks.com/question527.htm
Cheers
Ryan