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Transverse Abdominus. This is the innermost layer of the abdominal wall with fibers running horizontally across the abdomen and waist.
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Internal Obliques run from the front hip bones to lower ribs. They are involved in flexing and rotating the spine as well as compressing the abdominal wall
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External Obliques run from the outer surface of the lower 8 ribs to the Iliac crest, pubis and fascia on the rectus abdominus. They are responsible for flexing and rotating the spine as well as compressing the abdominal wall.
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Rectus Abdominus runs from pubis to sternum and costal rib cartilages. Its role is to flex the spine while tensing and compressing the abdominal wall.
Example exercises using all 4 layers
Transverse abdominus – Stabilizing the abdomen during a Plank hold
Internal Obliques e.g. Oblique twists and side curls
External Obliques – Oblique twists, Crunches
Rectus abdominus – Crunches, full Situps
Why not try one of our core classes to develop a strong and powerful midsection!. Head to www.kmjgroupfitness.com for class times.