This story is such bullshit. Body fat isn't the only indicator of health; you can do cardio every day and keel-over at 45 congestive heart failure. Besides, what percentage of people with unhealthy diets work out six times a week? my guess: a very small one.
I don't think Super Size me proves anything we didn't know already, and I think it's a pretty boring idea for a film, but it's a step in the right direction — this guy's being a dick by trying to make some stupid points about objectivity while justifying, what, for all intents, is costing a lot of tax dollars.
What's he doing teaching biology anyway? must be a highschool teacher.