Coach Coy
Mileage Matters.
Here is an article I wrote for Stack.com this summer.
How Increasing Mileage Makes You a Faster Runner
Adequate mileage isn't the only component needed to perform your best in distance running, but it just might matter the most.
https://www.stack.com/a/mileage-matters-how-far-do-you-need-to-run-to-get-good-at-running