First, those people are dirty liars, because there is no way to achieve higher-level enjoyment from running, because there’s no way to achieve any enjoyment from running, because there is nothing enjoyable about running. Running is awful, and no one should ever do it unless they’re being chased by a bear. And second, Aristotle’s flourishing, to me, is a sort of “runner’s high” for the totality of our existence—it’s a sense of completeness that flows through us when we are nailing every aspect of being human.