<p>This was a good post on my running forum by one of the top local runners who ran in college. I wanted to share it because I know it is hard for non-runners to understand why I keep slogging away day after day instead of varying my routine, which is, as iDad points out, a better way to achieve overall fitness.</p>
<p>"Weekly mileage is hugely important. It’s probably THE most important variable in running success. It’s the day-in-day-out runs that transform your body into the body of a runner. They are the runs that make the changes in your heart, your capillaries, your nerves, your muscles, and your mind.</p>
<p>…: the most specific thing to do in training for the marathon would be to run 26.2 miles every day at marathon pace. </p>
<p>But why don’t we do that? Because it would break us down. So, in training, we have to take smaller pieces and put them together over a long time, build capacities slower. We have to break the marathon down into its components: the pace, the distance, the strength, the fueling, the resistance to pounding, etc. We work on these individually in pieces through the week. Instead of running 26.2 miles at marathon pace every day, we get to the point where in the course of a week we can run 50 miles or 60 miles or even 100 miles, with perhaps 20% of that faster than or at marathon pace. We never run the marathon distance at marathon pace, but we end up training the body to do this by breaking up the different demands of the marathon over the week and keeping these aspects stimulated in a way that we can absorb and profit from.</p>
<p>Now, coming to your question about long runs: long runs are not great training tools because the stress is too high. The body doesn’t respond well to the stimulus. The long run breaks you down more than it builds you up, especially if you haven’t been running much. So, we need to prepare the body to be able to benefit from the long run. That’s the role of weekly mileage–to prepare the body of the runner to be able to benefit maximally from the specific training of the long runs in the final phase of training and then eventually for the demands of the race itself.</p>
<p>What benefit do you get from running more weekly mileage? A stronger heart, more developed capillaries, better fuel delivery, stronger muscles and tendons, a nervous system more attuned to the demands of running. These are the SPECIFIC things you will need to run well at the marathon distance. And you get them all from that daily hour run, done in a way that stimulates these capacities but in a way that you can grow from them…"</p>