Anthony Famiglietti, a two-time Olympian with a mile PR of 3:55.71 (in 2006), turns 40 in five months. He’s gearing up by training hard, pitching a documentary and letting the world know he’s shooting for a sub-4. It’s a stretch. But you gotta admire the grit. See Martin Fritz Huber’s story in Outside. The former steepler’s “moonshot mile is perhaps an unusual way to confront the beast of senescence, but it makes a crazy kind of sense. When you’ve spent more than half your life constructing your identity around the fact that you can run faster than 99.99 percent of…