📖 Static demo — read-only snapshot

You’re browsing a static build of the Body IQ knowledge graph, so everything loads with no backend. A few things that need the live server are turned off here:

  • Global search (sidebar) is disabled — it queries the API.
  • The JSON API and the API “Try it” playgroundaren’t included.
  • FHIR resources are build-time snapshots served as static files, not the live /api/exercises/<slug>/fhir route.
  • The data is a snapshot — it refreshes only when the demo is rebuilt, not live from the database.

Everything else — the body map, progression ladders, coverage heatmap, exercise finder, and all anatomy/exercise/source pages — works fully. The full app (live search + API + database) runs from the source on GitHub.

Knee Internal Rotation

Tibiofemoral Joint • Knee • transverse plane

Draft80%

Internal rotation of the tibia on the femur. Occurs primarily with the knee flexed. Popliteus initiates 'unlocking' of the knee from full extension.

Axis: longitudinal

Normal Range of Motion

AROM
0–10°
Active range
PROM
—
Passive range

Measured with the knee flexed to 90°.

Source: AAOS / Norkin & White

Muscles (5)

MuscleRoleNotes
PopliteusPrimary'Unlocks' knee from full extension
SemitendinosusPrimaryMoment arm at 30° flexion: 6.8-9.0 mm
SemimembranosusPrimaryMoment arm at 30° flexion: 10.1-11.6 mm
GracilisSecondaryMoment arm at 30° flexion: 6.0-15.7 mm
SartoriusSecondaryMoment arm at 30° flexion: 8.2-14.1 mm

Exercises (1)

Neuromuscular Exercise (Step-Downs / Single-Leg Balance)

Sources