Muscles/Pelvis

Pelvis

iliococcygeus

il-ee-oh-kok-SIJ-ee-us

The iliococcygeus forms the back part of the pelvic floor, spanning from pelvis to tailbone, supporting organs and pelvic stability. Important for core integrity in heavy lifts and preventing incontinence. Weakness shows in squats or postpartum.

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Common Pain & Injury

Pelvic floor dysfunction causes deep buttock or rectal pressure, urgency. Prolapse risk. See pelvic PT or doc for bowel/bladder changes.

Anatomy & Function

Origin

Tendinous arch of levator ani and ischial spine (pelvic side wall)

Insertion

Anococcygeal ligament and coccyx (tailbone ligaments)

Actions

Elevates pelvic floor
Supports pelvic viscera
Aids defecation

Innervation

Pudendal nerve (S3-S4) and direct sacral branches

Muscle Relationships

Antagonists

Pubococcygeus (relaxation)

Synergists

PubococcygeusCoccygeusPiriformis

Trigger Points

Sparse documentation; local pelvic pain, possible referral to sacrum.

Stretches

1Child's pose pelvic floor release

2Happy baby pose

3Deep squat pelvic floor stretch

Common Conditions

Pelvic floor dysfunctionLevator ani syndromeCoccydynia

Anatomical Parts

Right iliococcygeusLeft iliococcygeusLeft iliococcygeus

FAQ

What is iliococcygeus muscle?

Pelvic floor muscle supporting bladder/bowel, key for core stability.

Iliococcygeus pain symptoms?

Deep pelvic ache, worse sitting or straining.

Strengthen iliococcygeus?

Kegels and bridges target pelvic floor endurance.

Also Works iliococcygeus

10

Alternating Hang Clean position 1

Alternating Hang Clean position 2

Alternating Hang Clean

intermediate·kettlebells

Backward Drag position 1

Backward Drag position 2

Backward Drag

beginner·other

Band Good Morning position 1

Band Good Morning position 2

Band Good Morning

beginner·bands

Band Good Morning (Pull Through) position 1

Band Good Morning (Pull Through) position 2

Band Good Morning (Pull Through)

beginner·bands

Barbell Ab Rollout position 1

Barbell Ab Rollout position 2

Barbell Ab Rollout

intermediate·barbell

Barbell Ab Rollout - On Knees position 1

Barbell Ab Rollout - On Knees position 2

Barbell Ab Rollout - On Knees

expert·barbell

Barbell Full Squat position 1

Barbell Full Squat position 2

Barbell Full Squat

intermediate·barbell

Barbell Side Bend position 1

Barbell Side Bend position 2

Barbell Side Bend

beginner·barbell

Barbell Side Split Squat position 1

Barbell Side Split Squat position 2

Barbell Side Split Squat

beginner·barbell

Barbell Squat position 1

Barbell Squat position 2

Barbell Squat

beginner·barbell

Related Pelvis Muscles

The coccygeus is a small pelvic floor muscle supporting the coccyx (tailbone) at the back of the pelvis. It flexes the sacrococcygeal joint and stabilizes during lifts or impacts. Important for pelvic stability and preventing tailbone pain in squats.

External anal sphincter

The external anal sphincter is a skeletal muscle ring around the anus that you can consciously control for bowel movements. It maintains continence during daily activities and is strengthened via Kegels for pelvic floor health. Important for athletes in high-impact sports to prevent incontinence.

Part of pelvic floor, the pubococcygeus supports bladder/bowel, aids continence and core stability. Crucial for intra-abdominal pressure in heavy lifts like squats.

Tendinous arch of levator ani

The tendinous arch of levator ani is a fibrous white line on the pelvic sidewall anchoring levator ani muscles for pelvic floor support. It transmits fascia for stability during lifts. Critical for core integrity in squats and deadlifts.

Pelvis Pain Guide

Common causes and relief

Activities & Sports

See which activities use iliococcygeus