Hip

iliacus

il-ee-AY-kus

The iliacus is the fan-shaped hip flexor filling your pelvis bowl, partnering with psoas to lift the thigh. Crucial for running, kicking, and rising from sits. Tight iliacus contributes to anterior pelvic tilt and lower back strain in fitness enthusiasts.

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Common Pain & Injury

Snapping hip or groin ache from tightness, overuse in sprints. Iliopsoas tendinopathy common. Doctor if pain with hip flexion or snapping persists.

Anatomy & Function

Origin

Iliac fossa (inner surface of hip bone pelvis)

Insertion

Lesser trochanter of femur (inner thigh bone knob)

Actions

Hip flexion (lifts knee toward chest)
Stabilizes pelvis

Innervation

Femoral nerve (L2-L3)

Muscle Relationships

Antagonists

Gluteus maximusHamstrings

Synergists

Psoas majorRectus femorisSartorius

Trigger Points

Forms in iliac fossa; refers deep into hip, groin, anterior thigh, sometimes low back.

Stretches

1Lunge hip flexor stretch

2Thomas stretch

3Cougar stretch

Common Conditions

Iliopsoas tendinopathySnapping hip syndromeIliacus hematoma

Anatomical Parts

Right iliacusLeft iliacus

FAQ

What does iliacus muscle do?

Flexes hip powerfully, essential for climbing stairs and sprint starts.

Why is my iliacus tight?

From prolonged sitting; stretches like lunges release it to fix posture.

Iliacus pain in groin?

Trigger points refer there from pelvic origin overload.

Iliacus stretch for runners?

Deep lunge with posterior pelvic tilt targets it effectively.

Also Works iliacus

10

Alternating Floor Press position 1

Alternating Floor Press position 2

Alternating Floor Press

beginner·kettlebells

Alternating Renegade Row position 1

Alternating Renegade Row position 2

Alternating Renegade Row

expert·kettlebells

Atlas Stones position 1

Atlas Stones position 2

Atlas Stones

Band Assisted Pull-Up position 1

Band Assisted Pull-Up position 2

Band Assisted Pull-Up

beginner·other

Body-Up position 1

Body-Up position 2

Body-Up

intermediate·Bodyweight

Bodyweight Flyes position 1

Bodyweight Flyes position 2

Bodyweight Flyes

intermediate·e-z curl bar

Carioca Quick Step position 1

Carioca Quick Step position 2

Carioca Quick Step

Catch and Overhead Throw position 1

Catch and Overhead Throw position 2

Catch and Overhead Throw

beginner·medicine ball

Chest Push from 3 point stance position 1

Chest Push from 3 point stance position 2

Chest Push from 3 point stance

beginner·medicine ball

Chest Push (multiple response) position 1

Chest Push (multiple response) position 2

Chest Push (multiple response)

beginner·medicine ball

Related Hip Muscles

adductor brevis

Short inner thigh muscle adducts the thigh and assists rotation, key for lateral stability in squats and sprints. Middle adductor, it prevents groin pulls in dynamic sports. Essential for balanced leg power.

adductor longus

Prominent inner thigh muscle adducts and flexes the hip, powering lateral lunges and cutting moves. Prone to strains but key for athletic power. Gym staple for groin strength.

adductor magnus

Largest inner thigh muscle, with adductor and hamstring-like parts, adducts and extends hip powerfully. Mimics hamstring in deadlifts. Crucial for posterior chain balance.

adductor minimus

Small deep inner thigh muscle above magnus, aids adduction and rotation. Stabilizes hip in single-leg work. Often overlooked but prevents imbalances.

gemellus inferior

Small deep rotator in the hip, gemellus inferior laterally rotates and stabilizes the thigh. Works with piriformis in squats and pivots. Crucial for hip control in sports.

gemellus superior

Tiny hip muscle above ischial spine, gemellus superior laterally rotates femur. Assists in twisting sports and hip stability. Part of deep six rotators.

gluteus maximus

Largest hip muscle, gluteus maximus extends and externally rotates thigh for powerful hip thrust in squats, deadlifts, running. King of posterior chain.

Side hip muscle for abduction and stabilization during single-leg stance in running, squats. Prevents Trendelenburg gait.

Hip Pain Guide

Common causes and relief

Activities & Sports

See which activities use iliacus