📖 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.
Flexor Hallucis Longus
Deep posterior compartment. Flexes the great toe at IP joint and assists plantarflexion. Critical for push-off in gait.
Draft95%
Anatomy
- Origin
- Posterior fibula, interosseous membrane
- Insertion
- Distal phalanx of great toe
- Action
- Great toe flexion (IP), assists ankle plantarflexion
- Innervation
- Tibial nerve (S1-S2)
- Blood Supply
- Posterior tibial and peroneal arteries
Movements (3)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Ankle Plantarflexion | Talocrural Joint | Secondary | — |
| Foot Inversion | Subtalar Joint | Secondary | — |
| Toe Flexion (MTP) | Metatarsophalangeal Joints (Toes) | Secondary | — |
Exercises (12)
| Exercise | Role |
|---|---|
| Toe Yoga (Big Toe Up / 4 Toes Down) | Primary |
| Calf Raise (Explosive Concentric) | Secondary |
| Chair-Supported Single-Leg Balance | Stabilizer |
| Heel Raise (Eccentric Emphasis) | Synergist |
| Seated Calf Raise | Synergist |
| Stair Calf Raise | Synergist |
| Calf Raise off Stair Edge | Synergist |
| Arch Doming (Short-Foot Exercise) | Synergist |
| Standing Calf Stretch on Step | lengthening |
| Active Hallux Extension (Big Toe Lifts) | lengthening |
| Doorframe Calf Stretch | lengthening |
| Knee-to-Wall Ankle Mobilization | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Flexor Hallucis Longus — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Flexor Hallucis Longus