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An Overview of the Core Muscles

An Overview of the Core Muscles

Not only does a conditioned core make you look great, it is the major group of muscles that support you in an upright position. Your erect posture results from these 3 primary muscle groups of the abdominal core:

  • Rectus Adomimus
  • Obliques
  • Intercostals


Rectus Adominus

Frequently referred to as "abs" or "six-pack" or "washboard", this flat muscle runs the whole length of the abdominal area. It connects simply under the pectoralis group at the top and at the front of the pelvis on the bottom. Its major purpose is to hold in the internal organs and permit the spinal column to flex forward providing us the ability to flex forward at the waist.


Consisted of the external and internal obliques, these 2 muscle groups run the whole length of the chest from collarbone to the pelvis. Laterally they start on each side of the Rectus Adominus and cover around the waist terminating midway down the spinal column to simply above the butts (the gluteus maximus). As their name recommends, the internal obliques lie deeper underneath the external obliques.

Both obliques permit us to bend sideways and rotate our trunk in both directions. In addition, the obliques, like the rectus abdominus, also compress and hold the internal organs. The obliques are also liable in aiding with digestion and are the muscles made use of when we forcibly exhale along with assisting with great erect posture.


The intercostals muscles run between the ribs and comprise the wall of the chest cavity. Just like many of the other muscle groups these too likewise break down into both internal and external.

External-- This part of the intercostals are situated on the exterior of the ribs and function to increase the size of the thoracic cavity-- the location from the neck to the diaphragm when contracted. They also assist with normal and forced inhalation.

Internal-- The internal intercostals are located on the in of the ribs and do simply the opposite-- they make the thoracic cavity smaller when contracted and aid with exhalation, both normal and required.

Structure Core Muscles

While there are lots of workouts that can develop the stomach core, these are the essentials ones to start with:

Rectus Adominus-- crunches or sit-ups
Obliques-- side bends and decline oblique crunches
Intercoastals-- trunk twists

While having a "six-pack" is the dream of a lot of people, they are far more valuable than for attracting the opposite sex. Not only do they serve to make the core more flexible, but also add stability to your posture.

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