It seems to me he is solving the wrong problem.<p>The problem isn't that we don't know our fitness data, the problem is that we are lazy and don't want to exercise. We might want to want to exercise (a big difference), but we don't want to exercise.<p>Solve that problem and you will have a ton of money on your hands.<p>(I know there are some of you out there who loves to exercise or who do it even when they hate it. Please accept that you are very far from the norm and enjoy your good life.)