A Comprehensive  Guide to Engaging  Your Core

Dashed Trail

Rectus abdominis

The rectus abdominis, also known as the six-pack muscle, connects the front of the pelvis to the lower ribcage. 

Internal and external obliques

The internal and external obliques attach to the ribcage and pelvis on the lateral sides of the thorax.

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Transversus abdominis

The origins of the transversus abdominis include the rear and top of the pelvis and the lower six ribs.

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Pelvic floor

The pelvic floor muscles are located on the pelvic underside and function similarly to a hammock or drape. 

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The diaphragm attaches to the underside of your lower ribs.


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Your back extensors consist of the erector spinae muscles, quadratus lumborum, and multifidus.

Back extensors

The iliacus and psoas major are two hip flexors that converge to form a single muscle mass, hence the name iliopsoas.