Understanding Run Fitness

Your fitness number is most useful as a dated evaluation with evidence, not as a permanent label or a grade.

Run Fitness — AgentRunCoach’s measure of current running ability — is shown with when it was evaluated, what evidence produced it and how confident that evidence is. Its history helps you see whether fitness is rising, holding or falling without pretending every ordinary run creates a new estimate.

What it is used for

Run Fitness translates current ability into familiar race equivalents and a pace profile for training. A 10K-equivalent performance is the central reference, while equivalent times at other distances help explain the same fitness in race terms.

Those equivalents are not promises. Course, weather, altitude, fatigue, pacing, fueling and distance-specific preparation can all move an actual race away from the equivalent.

Where an evaluation comes from

The strongest evidence is a recognized race result. Before you have one, your coach can record an informed estimate from the history and performances you provide. Older evidence can still be shown, but its confidence describes how much weight it deserves now.

Routine workouts do not independently recalculate the number after every run. They provide evidence about whether the current evaluation still fits: repeated execution of prescribed work can support it, while a gap or a persistent mismatch can be a reason to reassess.

How it affects training

The current evaluation helps resolve your named workout paces and pace zones. As the evaluation changes, those targets can change with it. Tested results can also override a theoretical pace for the distance they measured, so the coach can preserve stronger direct evidence instead of forcing every target through one formula.

Run Fitness is a practical running-fitness scale, not a laboratory physiology claim. Use it to compare your own evaluations and turn current performance into usable training targets.