> the distance in fitness from a mile a day to running a half marathon isn't so great. I think there is a vast amount of detail being glossed over here. The 90

> the distance in fitness from a mile a day to running a half marathon isn't so great. I think there is a vast amount of detail being glossed over here. The 90th percentile 1 mile runner and the 10th percentile 13.1 mile runner might not have a great difference in fitness, but the gal can grow quite a bit by changing those percentiles.