I think the problem is that the implementation process -- creating an actual exercise program -- is quite non-obvious. As far as I know, the studies that have been done on the dose-response curves of various exercises have reached somewhat inconsistent results, except that they consistently show significant inter-individual variability for a given tuple of type, dose, and outcome measure (NB: they do <i>not</i> generally show a single unified axis of exercise super-responders and non-responders, a common interpretation of such studies in the news media).<p>For the general population not trying to optimize performance in a specific sport, the nuts-and-bolts business of &quot;what exercise should I do?&quot; is fraught with bargeloads of pseudoscience, tribal lore, magical thinking, fad-chasing, and actively-amplified marketing nonsense.<p>And then if, despite the atmosphere of uncertainty, you convince yourself to try something and it doesn&#x27;t work for you, that method&#x27;s dedicated acolytes will waste no time in telling you that you must be doing it wrong, must by lying about something, are just looking for excuses to be lazy, and so on.<p>It&#x27;s not really an environment that&#x27;s shaped for success.