📖 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.
Subscapularis
Rotator cuff muscle on the anterior surface of the scapula. Primary internal rotator.
Draft95%
Anatomy
- Origin
- Subscapular fossa
- Insertion
- Lesser tuberosity of humerus
- Action
- Internal rotation, adduction; superior portion contributes to arm elevation and horizontal flexion; inferior portion primarily horizontal flexion and internal rotation
- Innervation
- Upper and lower subscapular nerves (C5-C7)
- Blood Supply
- Subscapular artery, anterior circumflex humeral artery, posterior circumflex humeral artery
Movements (7)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Shoulder Internal Rotation | Glenohumeral Joint | Primary | — |
| Shoulder Abduction | Glenohumeral Joint | Secondary | 30% contribution |
| Shoulder Adduction | Glenohumeral Joint | Secondary | — |
| Shoulder Horizontal Adduction | Glenohumeral Joint | Secondary | — |
| Shoulder Extension | Glenohumeral Joint | Stabilizer | Rotator cuff stabilization |
| Shoulder External Rotation | Glenohumeral Joint | Stabilizer | Antagonist control |
| Shoulder Flexion | Glenohumeral Joint | Stabilizer | Rotator cuff stabilization |
Exercises (17)
| Exercise | Role |
|---|---|
| Resisted Internal Rotation | Primary |
| Barbell Bench Press | Stabilizer |
| Dumbbell Bench Press | Stabilizer |
| Pull-Up | Stabilizer |
| Chin-Up | Stabilizer |
| Dip | Stabilizer |
| Dumbbell Shoulder Press | Stabilizer |
| Lateral Raise | Stabilizer |
| Chest Fly | Stabilizer |
| Pec Deck | Stabilizer |
| Downward Dog (Adho Mukha Svanasana) | Stabilizer |
| Scapular Clock (Wall-Supported) | Stabilizer |
| Side-Lying External Rotation | lengthening |
| Wall Angel | lengthening |
| External Rotation at 0° Abduction (Side-Lying or Band) | lengthening |
| Prone External Rotation at 90° Abduction | lengthening |
| Resisted External Rotation | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Subscapularis — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Subscapularis