Speaking of Noakes, something he said that I found particularly insightful is that if you're eating a diet that is wrong for you body, (a high-grain/carb diet for example, for many people) if exercise makes you eat more of it, then the exercise is actually doing more harm than good.
I also think that many people are somewhat OCD when it comes to exercise (as opposed to gentle activity, like walking) and that is hard to find an ancestral example of to explain how we could be adapted for that.
