📖 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.

Iliopsoas

Combined iliacus and psoas major. Primary hip flexor. Psoas tendon inserts separately from iliacus into a crest on the lesser trochanter. In anatomical position, produces hip flexion without rotational component; with hip abducted, produces flexion, adduction, and lateral rotation.

Draft95%

Anatomy

Origin: Iliacus: iliac fossa, anterior sacroiliac ligament; Psoas major: transverse processes, vertebral bodies, and intervertebral discs of T12-L5
Insertion: Lesser trochanter of femur; psoas tendon inserts separately from iliacus into crest running from superior to anterior aspect of lesser trochanter
Action: Hip flexion (primary); psoas also assists lumbar spine flexion; iliacus can selectively stabilize pelvis during contralateral hip extension
Innervation: Iliacus: femoral nerve (L2-L4); Psoas: ventral rami L1-L4, with L2-L3 branches most robust; nerve branches commonly cross L2-3, L3-4, L4-5 discs obliquely
Blood Supply: Lumbar arteries, iliolumbar artery, deep circumflex iliac artery

Movements (3)

Movement	Joint	Role	Notes
Hip Flexion	Hip Joint (Coxofemoral)	Primary	—
Lumbar Flexion	Lumbar Intervertebral Joints	Secondary	Psoas major when hip is fixed
Hip External Rotation	Hip Joint (Coxofemoral)	Synergist	Assists when hip is flexed

Exercises (39)

Exercise	Role
Straight Leg Raise	Primary
Hip Flexor and Hamstring Stretching	Primary
A-Skip / B-Skip Running Drills	Primary
Couch Stretch (Rectus Femoris / Hip Flexor)	Primary
Active Straight Leg Raise (ASLR)	Primary
A-Skip Drill	Primary
Sit-Up	Primary
Mountain Climber	Primary
Hanging Leg Raise	Primary
Standing Hip Circles	Primary
Active Anterior Pelvic Tilt	Primary
Pelvic Clock Mobilization	Primary
Bird Dog to Elbow-Knee	Secondary
Hollow Body Hold	Secondary
Quadriceps Strengthening (SLR / Terminal Knee Extension)	Secondary
Burpee	Secondary
Pelvic Realignment Exercises (Pelvic Tilts)	Secondary
Glute Bridge with March	Secondary
Bear Crawl	Secondary
Crunch	Stabilizer
Russian Twist	Stabilizer
Wall Hamstring Stretch	Stabilizer
Seated Knee Extension (Bodyweight)	Stabilizer
Cook Hip Lift (Single-Leg Bridge with Contralateral Hip Flexion)	Stabilizer
Modified Curl-Up / Dead Bug	Stabilizer
Supine Hamstring Stretch (Strap-Assisted)	Stabilizer
Superman	lengthening
Mindfulness-Integrated Stretching	lengthening
Hip Thrust	lengthening
Prone Hip Extension (Active, Slow Tempo)	lengthening
Jump Squat	lengthening
Split Squat / Bulgarian Split Squat	lengthening
Forward Lunge	lengthening
Standing Lumbar Extension	lengthening
Standing Quad Stretch	lengthening
World's Greatest Stretch	lengthening
Knee Split Squat Isometric Holds	lengthening
Walking Lunges with Trunk Rotation	lengthening
Reverse Lunge	lengthening

Sources

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