AMAURY PAUL 8 min read IRAN ALONG the west side of Manhattan, listening to a man I just met tell me about his supplement stack. I’m certainly not a supplement person—I’m more likely to swap favorite routes on an outing like this—but I nodded along because that’s the polite thing to do when someone is potentially a romantic prospect. This wasn’t a date, exactly. I was at a singles shakeout run that was part of Hyrox ’s New York event, a two-weekend fitness extravaganza that doubled as an opportunity to find a special someone who also wants to spend their time running around a concrete course filled with workout gear. At least that’s how it was billed online. After run clubs were tabbed as the sweaty alternative to dating apps , social media crowned a new place to find a (very fit) significant other : Hyrox.…