Rectus Abdominis

Short definition

The six-pack: flexes the trunk and drives intra-abdominal pressure.

Full definition

Rectus abdominis — from the cartilages of ribs V–XI and the xiphoid process to the pubic crest (and body). Functions: trunk flexion forward, pelvic stabilization in leg raise; increase in intra-abdominal pressure (squat, deadlift); expiratory support. Mass ≈ 0.8–1 % at 20–25 % body fat.

Examples

Crunk — the rectus abdominis.

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