The NXT RUN Blog

Training science, runner to runner

Coaching that adapts to you, backed by real sports science. Notes on training, racing, and getting to the next level.

A runner checking the data on his GPS watch on a forest trail
Training Science

The Run Impact Score & Fitness Trend Chart, Explained

Did that workout actually do anything? Here is how NXT RUN scores every run for Endurance, Strength, and Speed, and how the Fitness Trend Chart shows where your training is really heading.

NXT RUN Coaching Team·May 21, 2026·7 min read

More articles coming soon. Lace up.

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