Does anyone know of a resource to estimate marathon time improvement for a mediocre marathoner (PR: 3:30) if weekly mileage is upped from 60 miles to 75 miles?
And if not, how much time improvement would you predict and why?
Does anyone know of a resource to estimate marathon time improvement for a mediocre marathoner (PR: 3:30) if weekly mileage is upped from 60 miles to 75 miles?
And if not, how much time improvement would you predict and why?