📖 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.

Rectus Femoris

Two-joint quadriceps muscle. Only quad that crosses the hip — assists hip flexion in addition to knee extension.

Draft95%

Anatomy

Origin: Anterior inferior iliac spine (straight head) and ilium above acetabulum (reflected head)
Insertion: Patella via quadriceps tendon, then tibial tuberosity via patellar ligament
Action: Knee extension, hip flexion
Innervation: Femoral nerve (L2-L4)
Blood Supply: Lateral femoral circumflex artery

Movements (2)

Movement	Joint	Role	Notes
Hip Flexion	Hip Joint (Coxofemoral)	Primary	—
Knee Extension	Tibiofemoral Joint	Primary	Two-joint component of quadriceps

Exercises (32)

Exercise	Role
A-Skip Drill	Primary
Hip Flexor and Hamstring Stretching	Primary
Straight Leg Raise	Primary
Quadriceps Strengthening (SLR / Terminal Knee Extension)	Primary
Couch Stretch (Rectus Femoris / Hip Flexor)	Primary
Burpee	Secondary
Leg Extension	Secondary
Standing Hip Circles	Secondary
Wall Ball Squat	Secondary
Hollow Body Hold	Secondary
Hanging Leg Raise	Secondary
Active Straight Leg Raise (ASLR)	Secondary
Active Anterior Pelvic Tilt	Secondary
Russian Twist	Stabilizer
Sit-Up	Synergist
Glute Bridge with March	Synergist
Single-Leg Sit-to-Stand	Synergist
Seated Knee Extension (Bodyweight)	Synergist
Mountain Climber	Synergist
Eccentric Stair Descent	Synergist
Wall Sit Isometric	Synergist
Countertop-Supported Squat	Synergist
Bird Dog to Elbow-Knee	Synergist
Knee Split Squat Isometric Holds	lengthening
Reverse Lunge	lengthening
Leg Curl	lengthening
Hip Thrust	lengthening
World's Greatest Stretch	lengthening
Mindfulness-Integrated Stretching	lengthening
Standing Quad Stretch	lengthening
Forward Lunge	lengthening
Split Squat / Bulgarian Split Squat	lengthening

Sources

Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Rectus Femoris — origin, insertion, action, innervation
Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Rectus Femoris