📖 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.
Hip Flexion
Hip Joint (Coxofemoral) • Hip • sagittal plane
Bringing the thigh anteriorly toward the trunk in the sagittal plane.
Axis: medial-lateral
Normal Range of Motion
Measured supine with the knee flexed (to slacken the hamstrings). AAOS and Norkin & White list 0-120 degrees; with the knee extended, hamstring tension typically limits hip flexion to roughly 80-90 degrees.
Source: AAOS Joint Motion; Norkin & White 2016
Muscles (10)
| Muscle | Role | Notes |
|---|---|---|
| Pectineus | Primary | — |
| Iliopsoas | Primary | — |
| Rectus Femoris | Primary | — |
| Gluteus Minimus | Secondary | Anterior fibers |
| Adductor Brevis | Secondary | — |
| Sartorius | Secondary | — |
| Adductor Longus | Secondary | — |
| Erector Spinae Group | Stabilizer | Eccentric control of trunk |
| Transversus Abdominis | Stabilizer | Core stabilization |
| Quadriceps Femoris | Synergist | Via rectus femoris |
Functional Tasks (6)
Exercises (52)
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Biomechanics of Hip Flexion