Transverse Abdominus. This is the innermost layer of the abdominal wall with fibers running horizontally across the abdomen and waist.
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
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.
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.