📖 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.
Elbow Flexion
Humeroulnar Joint • Elbow • sagittal plane
Decreasing the angle between the forearm and upper arm.
Axis: medial-lateral
Normal Range of Motion
AAOS and Norkin & White cite 0-150. AMA Guides list 140; passive flexion may reach ~160 depending on forearm/arm soft-tissue bulk. Normal end-feel is soft (soft-tissue approximation).
Source: AAOS Joint Motion; Norkin & White 2016
Muscles (5)
| Muscle | Role | Notes |
|---|---|---|
| Brachialis | Primary | Pure flexor, active regardless of forearm position |
| Biceps Brachii | Primary | Most active with forearm supinated |
| Brachioradialis | Primary | Most active with forearm in neutral position |
| Supinator | Stabilizer | Maintains supination during flexion |
| Pronator Teres | Synergist | Offsets inappropriate supination torque from biceps |
Exercises (17)
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Biomechanics of Elbow Flexion