📖 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.
- 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.
Shoulder Extension
Glenohumeral Joint • Shoulder • sagittal plane
Draft80%
Movement of the arm posteriorly in the sagittal plane.
Axis: medial-lateral
Normal Range of Motion
AROM
0–60°
Active range
PROM
0–60°
Passive range
Measured prone with goniometer axis at the acromion. AAOS lists 60 degrees; some sources (AMA Guides, Boone & Azen) cite 50 degrees. PROM norm equals AROM norm.
Source: AAOS Joint Motion; Norkin & White 2016
Muscles (8)
| Muscle | Role | Notes |
|---|---|---|
| Latissimus Dorsi | Primary | — |
| Posterior Deltoid | Primary | — |
| Pectoralis Major | Secondary | Sternal head, from flexed position |
| Triceps Brachii | Secondary | Long head |
| Middle Trapezius | Stabilizer | Scapular retraction |
| Infraspinatus | Stabilizer | Rotator cuff stabilization |
| Subscapularis | Stabilizer | Rotator cuff stabilization |
| Teres Minor | Synergist | — |
Functional Tasks (2)
Pushing Up from Chairsupportive
Getting In and Out of Bedsupportive
Exercises (16)
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Biomechanics of Shoulder Extension