The marathon isn't just a longer 5K. It's a completely different race — and understanding why changes how you train for it, fuel for it, and race it.

The first miles are hard for every runner at every level — and it's not weakness. It's your brain doing exactly what it was built to do. Here's the science behind it.

Solo training builds fitness. Group training builds fitness and something else — a pull toward the work that's hard to manufacture on your own. Here's why.

Going into Chicago chasing sub-2:30 at 110+ miles a week, one shoe can't do every job. Here's the full 5-shoe rotation and the logic behind each one.

Most nutrition plans weren't built for running — they were borrowed from general fitness and applied to a sport they were never designed for. Here's the system that actually accounts for the sport.

Emergency porta-potty stops at mile 4 aren't bad luck. They're a pattern — and once you understand how your gut actually works, you can fix it.

Traditional calorie tracking has blind spots most people never see. Here's where your deficit is actually disappearing — and how Metabolic Running accounts for the noise.