Superficial / Outermost Abdominals: Core Form & Function

Rectus Abdominis

• Bends spine forward and compresses the abdominal contents.
• “Stabilization is a key function.” (David Keil)
• Worked in Navasana (Boat Pose), Ardha Navasana (Half Boat) and Bakasana / Kakasana (Crane / Crow).
• Lengthened in Urdhva Dhanurasana (Upward Bow / Wheel Pose).

Rectus is the Latin word for straight. Abdominis, of course, refers to the abdomen. The rectus abdominis, specifically, is the straight abdominal muscle that we’re all familiar with. It’s important to recognize that the origin and insertion of the rectus abdominis can change depending on the movement. Because of the long area it covers and the strength necessary, it’s compartmentalized into little packets. This is what we refer to as the six pack. Technically there are four compartments on each side. – David Keil

Internal and External Obliques

• Twists torso and bends it sideways.
• Worked in Ardha Matsyendrasana (Half Lord of Fishes) and Utthita Trikonasana (Extended Triangle).