📖 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 Abdominis

Superficial anterior abdominal muscle. Primary trunk flexor. Divided into four compartments with independent nerve supply. Flexor moment arms increase ~30% in standing vs supine.

Draft95%

Anatomy

Origin: Pubic symphysis, pubic crest
Insertion: Costal cartilages of ribs 5-7, xiphoid process
Action: Trunk flexion, posterior pelvic tilt, compression of abdominal contents
Innervation: Thoracolumbar nerves (T6-L1), with a constant branch from L1; umbilicus always innervated by T10
Blood Supply: Superior epigastric artery, inferior epigastric artery, lower posterior intercostal arteries

Movements (2)

Movement	Joint	Role	Notes
Thoracic Flexion	Thoracic Intervertebral Joints	Primary	—
Lumbar Flexion	Lumbar Intervertebral Joints	Primary	~1/3 of total flexor moment

Exercises (44)

Exercise	Role
Hollow Body Hold	Primary
Bird Dog to Elbow-Knee	Primary
Crunch	Primary
Mountain Climber	Primary
Pelvic Clock Mobilization	Primary
Pelvic Realignment Exercises (Pelvic Tilts)	Primary
Hanging Leg Raise	Primary
Front Plank and Variations	Primary
McGill Curl-Up	Primary
Sit-Up	Primary
Modified Curl-Up / Dead Bug	Primary
Russian Twist	Secondary
Cat-Cow	Secondary
Standing Quad Stretch	Secondary
Overhead Squat (Assessment & Training)	Secondary
Burpee	Stabilizer
Jumping Jack	Stabilizer
Jump Squat	Stabilizer
Bear Crawl	Stabilizer
Downward Dog (Adho Mukha Svanasana)	Stabilizer
Countertop Incline Push-Up	Stabilizer
Cook Hip Lift (Single-Leg Bridge with Contralateral Hip Flexion)	Stabilizer
Glute Bridge with March	Stabilizer
Seated Trunk Rotation	Stabilizer
Box Jump (Bilateral)	Stabilizer
Quadruped Rockback	Stabilizer
Inverted Row	Stabilizer
Back Squat (Barbell)	Stabilizer
Front Squat	Stabilizer
Goblet Squat	Stabilizer
Barbell Row	Stabilizer
Lat Pulldown	Stabilizer
Pull-Up	Stabilizer
Chin-Up	Stabilizer
Dip	Stabilizer
Dumbbell Shoulder Press	Stabilizer
Triceps Pushdown	Stabilizer
Hip Thrust	Stabilizer
Standing Hip Circles	Stabilizer
Superman	lengthening
Standing Lumbar Extension	lengthening
Cobra Pose	lengthening
Active Anterior Pelvic Tilt	lengthening
Prone Press-Up (McKenzie)	lengthening

Sources

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