This idea that Valby and Cook have a vast amount of untapped potential because they are low mileage is triggering me.
Valby said she runs 25mpw or 30-35 mpw (inconsistent answers) and she spends two hours on an arc trainer, that is not equivalent to zero mileage, she does it three or four times every week and lifts weights.
Valby and Cook are two of the most highly trained runners in the NCAA. They have just replaced their long runs with time on an elliptical, arc trainer or aqua jogging. This allows them to up their "mileage" without getting injured because their body isn't strong enough to the tear and wear of actual running.
Tuohy has been high mileage since her high school days, now runs 70-75 mpw, lifts weight, cross trains a little and that's about it. Tuohy outruns them, but Valby and Cook outtrains Tuohy.
Valby and Cook are more injury-prone than Tuohy, their bodies cannot withstand running a high mileage, so why are people calling this an upside? Being fragile in the world of running is not an upside.
High Mileage is not a red flag. Fragility is.