Why More Mileage Isn't the Answer for a Lot of Young Runners

I hear this from parents a lot in September. "Should he be running more miles? The kid on the other team runs 50 a week." Maybe. Or maybe that's the wrong question entirely.

I coached at the Division I level for years, and I promise you, the athletes who lasted four healthy seasons weren't always the ones who ran the most miles in high school. A lot of them were the ones who built mileage the right way, at the right time, with the right support around it.

Here's the thing about mileage for middle and high school athletes. Growing bodies aren't scaled-down adult bodies. Bones, tendons, and growth plates are still developing, and they respond to load differently than a 22-year-old college athlete's body does. Piling on volume before an athlete has the strength and mechanics to handle it is exactly how you end up with a stress fracture in October instead of a state finals appearance.

What actually predicts long-term success isn't weekly mileage, it's load management over years. That means building mileage gradually across seasons, not spiking it because a rival team posted a workout on Instagram. It means two dedicated strength sessions a week so the muscles and connective tissue can actually support the mileage you are running. It means mobility work so form doesn't break down late in a race when fatigue sets in. This is the exact gap our strength and mobility program was built to close, because I got tired of watching talented kids get hurt from doing too much, too soon, with no support system underneath it.

More miles will make a fit kid faster in the short term. It will also, more often than people want to admit, make an unprepared kid injured by November. The goal isn't maximum mileage. It's the right training stimulus for where that specific athlete is right now.

If you're not sure whether your athlete's current plan makes sense for their age and stage, that's a conversation worth having.

Some places to dig deeper:

See how we structure training by age and stage on the 1-on-1 coaching page.

Read the full breakdown of our approach on strength and mobility.

Check my coaching background and philosophy on About Coach.

Browse more training topics on Coach's Notes.

If your athlete is dealing with recurring soreness or a nagging injury, don't wait, reach out and let's talk through it.

Curious about joining a program that trains volume and strength together? Get started here.

Train smart this fall, not just hard.