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Rectus Abdominus

Rectus Abdominus is the most superficial of the abdominal muscles. It is this muscle which forms the six-pack shape!

Origin

• Crest of the pubis
• Pubic symphesis

Insertion

• Xiphoid process (base of the sternum)
• 5th,6th and 7th costal cartilages

Actions

• Flexes lumbar spine

Innervation

• Ventral rami of thoracic nerves

Daily uses

• Moving from lying to sitting

How can I stretch it?

• Abdominal stretch
• Abdominal stretch 2

How can I strengthen it?

• Crunches or sit-ups
• Reverse crunch