📖 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.
Tibialis Posterior
Deepest posterior compartment muscle. Primary invertor and supports the medial arch.
Draft95%
Anatomy
- Origin
- Posterior tibia, fibula, and interosseous membrane
- Insertion
- Navicular tuberosity and plantar surfaces of cuneiforms and metatarsals 2-4
- Action
- Foot inversion, assists plantarflexion, supports medial longitudinal arch
- Innervation
- Tibial nerve (L4, L5)
- Blood Supply
- Posterior tibial artery, peroneal artery
Movements (2)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Foot Inversion | Subtalar Joint | Primary | — |
| Ankle Plantarflexion | Talocrural Joint | Secondary | — |
Exercises (17)
| Exercise | Role |
|---|---|
| Single-Leg Balance Exercises (Star Excursion Balance Test) | Primary |
| Resisted Ankle Inversion/Eversion | Primary |
| Arch Doming (Short-Foot Exercise) | Primary |
| Ankle Eversion/Inversion Strengthening | Primary |
| Heel Raise (Eccentric Emphasis) | Secondary |
| Chair-Supported Single-Leg Balance | Stabilizer |
| Heel-to-Toe Walk | Stabilizer |
| Alfredson Protocol — Eccentric Heel Drops | Stabilizer |
| Heavy Slow Resistance (HSR) for Achilles Tendinopathy | Stabilizer |
| Tandem Stance Balance | Stabilizer |
| Heel Raise (Calf Raise) | Synergist |
| Seated Calf Raise | Synergist |
| Stair Calf Raise | Synergist |
| Calf Raise off Stair Edge | Synergist |
| Knee-to-Wall Ankle Mobilization | lengthening |
| Standing Calf Stretch on Step | lengthening |
| Doorframe Calf Stretch | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Tibialis Posterior — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Tibialis Posterior