make up any coherent group in the 21st century and they certainly don't invent things to keep poor people out. In some families (including my own) there are individual members of the family - who by a combination of hard work and good fortune and wise planning - have become people who would be considered "rich" while most everyone else is basically average income.

Hopefully you're joking here (especially given that a lot of the most committed runners I know are not at all rich - incidentally, I myself hate running and have to get my exercise playing sports).