[dragonwriter]

> The slight odds of infection when they are likely outdoors, or that they are running track, passing out, getting dehydrated, breathing high levels of CO2, and the unknown long-term health effects of that?

Unless you are wearing something like an SCBA mask without an appropriate air supply—which is very much not the masking recommended against COVID—that’s not going to happen, even while exercising strenuously.

> It doesn't take much common sense to realize that exposure to virus is bad, masking while running is potentially much worse for everyone

You are correct, having that “realization” definitely requires very little common sense.