A VO2 max exceeding one's age in milliliters per kilogram per minute is a potential heuristic for health, with a significant drop below age-based expectations indicating a problem.

“one of them is like what is the latest age I can like what's the oldest I can be such that my V2 Max in milliliters per kilogram per minute exceeds my age right like clearly at some point that will cease to be true right there's no 80-year-old whose V2 Max is 80 um so the question is like where does that happen and I think that's a really great heris for the health of a person is does that does that happen when you're 30 you hope not right if a 30-year-old's VO2 max Falls below 30 there's a huge problem”