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Running performance does not peak at 30 and fall off a cliff. The science of masters athletics tells a more nuanced story — and this site exists to help you read it. Age Graded Running is home to a free calculator that estimates your VO2max from any recent race time and translates it into personalized training zones, predicted race equivalencies, and a WMA age-grade score. Together they answer two questions every runner asks: What paces should I actually be training at? And how good am I, really, for my age? The calculator supports the Mile, 5K, 10K, Half Marathon, and Marathon.

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Running After 50: How to Train Smarter as a Masters Runner

There is a story runners tell themselves after 50, and it goes something like this: the best years are behind you, the times will keep slowing, and the goal now is damage control. Train less, expect less, accept the decline gracefully. The science does not support this story. And neither do the age-grade scores of […]

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WMA Age-Grade Score Explained: What Your Percentage Really Means

You just ran a 5K in 26:45. Your training partner, who is 58 years old, ran the same race in 28:10. You finished faster — but who had the better performance? That question has no good answer without age-grading. With it, the answer is immediate, mathematically precise, and often surprising. The Problem Age-Grading Solves Comparing

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What Is VO2 Max and How Does It Determine Your Training Paces?

VO2 Max is the single most important number in distance running. It is your body’s maximum rate of oxygen consumption — the ceiling on how fast your aerobic engine can run. Every training pace, every race prediction, every honest comparison between runners traces back to it. The good news is you do not need a