Probably not totally related as it's not as stigmatized, but I'm a sub-elite runner, and I have a very public internet persona around running, which is linked to my real name. I left all that up, and I mention my elite development club on my CV (at the bottom). It has nothing to do with my research interests. But I know a lot of professors who have also been sub-elite runners at one point or another (including my undergrad advisor, who was actually probably more along the lines of elite), and I figure what will probably happen is the professors who know what I'm talking about will think it's cool or a connection point, while the professors who don't care about running will just ignore it.
My undergrad advisor had all of his running accomplishments on his CV, and that's one reason we clicked so well