Understanding grades

What green, yellow, and red mean — and what they do not mean.

Last updated April 17, 2026

Each metric in a completed assessment is assigned a grade based on its value relative to documented thresholds.

Grade levels

  • Green — the value is within the expected range.
  • Yellow — the value is borderline. May warrant monitoring or attention.
  • Red — the value is outside the expected range.

Grades are produced per metric, then aggregated to an overall grade for the module using a worst-case rule: if any metric is red, the overall is red; if any is yellow, the overall is yellow; otherwise green.

What grades mean

A grade is a descriptive observation of how the value compares to a reference threshold. It is not:

  • A diagnosis
  • A statement of clinical significance
  • A prediction of injury risk
  • A validated clinical cutoff

See our Disclaimer for the full intended use statement.

What grades do not mean

  • Red ≠ injured. A red grade means the value is outside the reference band. Many factors cause this, including measurement error, lighting, pacing, or genuine movement quality.
  • Green ≠ healthy. A green grade means the single metric is within the reference band. It does not clear the subject for any activity.
  • Grades across metrics are not comparable. A red gait speed and a red knee valgus reflect very different things.

How to use grades

  • Treat grades as prompts for closer review, not conclusions.
  • Cross-check grades against what you observed during the capture.
  • Compare the subject to themselves across sessions rather than to the threshold alone.
  • Consider grade changes over time more meaningful than absolute grades at one point in time.

Threshold provenance

Every threshold used in grading has a documented source type. See How thresholds were chosen for details.