I run and bike, and I've wondered about this too. Running seems like it should be the most affordable sport, but in America, at least, runners tend to be affluent. Perhaps wealthy areas are more hospitable to running, but I don't think that explains much.
I remember reading an article in the New Yorker about a retreat where people would go to participate in extended fasts. It struck me you need to come from abundance for the idea of recreational starvation to be appealing, and I think something similar could be said for sports like running, where punishment and self-denial are nearly an aim in themselves.
Another article I'm reminded of is "How the Other Half Lifts"[1]. There the author muses on cultural differences between strength and endurance sports. He suggests that upper middle class Americans favor endurance sports as a way to demonstrate "moral character, self-control, and self-development, rather than physical dominance." (My impression is that weight lifting has enjoyed something of a renaissance in recent years, though.)
[1]https://psmag.com/social-justice/half-lifts-workout-says-soc...
I remember reading an article in the New Yorker about a retreat where people would go to participate in extended fasts. It struck me you need to come from abundance for the idea of recreational starvation to be appealing, and I think something similar could be said for sports like running, where punishment and self-denial are nearly an aim in themselves.
Another article I'm reminded of is "How the Other Half Lifts"[1]. There the author muses on cultural differences between strength and endurance sports. He suggests that upper middle class Americans favor endurance sports as a way to demonstrate "moral character, self-control, and self-development, rather than physical dominance." (My impression is that weight lifting has enjoyed something of a renaissance in recent years, though.)
[1]https://psmag.com/social-justice/half-lifts-workout-says-soc...