QOOM grades metrics against thresholds that define green / yellow / red bands. This article explains where those thresholds come from, so you can interpret results appropriately.
Source categories
We label every threshold with one of the following source types:
Literature-informed
The threshold value is guided by published biomechanics or clinical research, but the exact cutoff may be adapted or simplified for product use. This is not a direct citation of a specific study's validated cutoff.
Example: Gait speed 1.2 m/s green threshold. Community walking speed norms commonly cite this value as a functional threshold for healthy adults, but our implementation is not a direct reproduction of any single study.
Heuristic / expert judgment
The threshold value is product-defined based on general professional knowledge, coaching convention, or internal team judgment. It is not derived from a specific published dataset.
Example: Squat trunk lean 20° green threshold. Based on general coaching guidance; the exact value is product-defined.
Internal norms
The threshold is derived from internal percentile data, such as cmj_norms_v0.ts. The underlying population and sample size are internal, not peer-reviewed.
Example: CMJ jump height 33 cm green threshold. Derived from the 50th percentile of our internal reference.
Why we label them explicitly
Many commercial movement analysis tools present thresholds as if they were clinically validated standards. QOOM takes a more conservative approach: every threshold is labeled so you know what kind of authority is behind it.
This matters because:
- Literature-informed thresholds should be interpreted as general-population reference points, not individual diagnostic cutoffs.
- Heuristic thresholds reflect coaching convention, not validated clinical standards.
- Internal norms are reference points, not population norms with known demographics.
Known limitations
Across all modules:
- No age, sex, or population stratification.
- Thresholds are general-purpose, not specific to rehabilitation, sport, or age group.
- Single-site cutoffs — symmetry and between-limb comparisons use the same metric-side thresholds.
How to use thresholds appropriately
- Use grades as a prompt for professional review, not as a standalone diagnostic.
- Compare a subject to themselves over time rather than to population thresholds when possible.
- Combine grade interpretation with your own clinical assessment.
See our full Disclaimer for the complete statement on intended use.