this report by now - it's been going around. Basically the idea is that while calories matter, what they consist of matters too.
This should surprise no one. Common wisdom is "you are what you eat" and if it's "a lot of non-nutritious food" instead of "sufficient but not too much highly nutritious food" why would you be surprised at poor health?
Want to bet that exercise is the same way? That it doesn't just matter how much you do, but what it consists of? Those are rhetorical questions. Of course it does. That's essentially what this blog is about. You need to exercise, but what you do and how you do it matters greatly.