I got into a debate with some of my teammates regarding times for runners who either increase mileage or go to altitude. So basically, you've got two guys who have the same PR's and are running 40MPW. Runner A goes to an altitude of 6000 ft for two months and keeps the mileage the same, while runner B stays at sea level during those two months and increases his mileage to 55MPW. Assume that neither of them get injured, and that their response to mileage and altitude is the same as an average person.
The two of them race at sea level a few days after runner A returns from altitude. Who will win, the altitude runner or the sea level runner that increased his mileage?
I'm saying the sea level guy wins regardless of the race distance. However, most of my teammates say the sea level guy can only win if the race distance is 800m or less, since the altitude guy will have less leg speed than the sea level guy. If the race distance is longer, they say that the altitude guy will win because for a 40MPW runner, altitude has a more positive effect on endurance than a 15MPW increase in mileage.
Would anyone here like to share their thoughts on this?