How We Calculate Exercise Similarity

The 12 Active Factors

Muscle sets use Jaccard overlap. Categorical and numeric fields use the comparison method shown below. These values come from the same metadata owner used by runtime scoring.

Movement subpattern

20% - Exact match, with half credit for the same parent pattern

Movement pattern

10% - Exact category match

Primary muscles

15% - Jaccard set overlap

Equipment category

10% - Exact metadata match before feasibility filtering

Body position

8% - Exact metadata match

Laterality

7% - Bilateral or unilateral category match

Stability requirement

7% - Inverse distance on the stored 1-10 scale

Skill complexity

5% - Inverse distance on the stored 1-10 scale

Force vector

5% - Exact category match

Exercise mechanic

5% - Compound or isolation match

Range-of-motion profile

4% - Exact metadata match

Grip type

4% - Exact match, with half credit for a related grip group

How the Score Is Calculated

Similarity score =
(Movement subpattern match x 0.20) +
(Movement pattern match x 0.10) +
(Primary muscles match x 0.15) +
(Equipment category match x 0.10) +
(Body position match x 0.08) +
(Laterality match x 0.07) +
(Stability requirement match x 0.07) +
(Skill complexity match x 0.05) +
(Force vector match x 0.05) +
(Exercise mechanic match x 0.05) +
(Range-of-motion profile match x 0.04) +
(Grip type match x 0.04)

Runtime scoring sums the weighted factor values, applies a stored equipment-conversion adjustment when one exists, caps non-identical pairs below 1.0, and rounds to three decimal places.

A higher score means the stored attributes are more alike under version 2. It does not guarantee identical training outcomes or individual suitability.

Data, Equipment, and Limits

• The active library count is read from FitnessVolt's exercise owner at request time: 2,056 active exercises.
• Each request scores at most 1,000 relevance-selected candidates from that active library.
• Missing metadata receives no guessed match, except the established bilateral laterality default retained for compatibility.
• Selected equipment is a feasibility constraint by default; unavailable and unknown requirements appear only in the explicitly expanded view and remain labeled.
• The score is an exercise-attribute comparison, not medical, rehabilitation, or individualized coaching advice.