“I want to have six-pack abs,” Jen announces. “Well, I want to have eight-pack abs,” responds Micah. Although they will need to exercise all abdominal muscles to build this kind of strength, which muscle will MOST likely need to be worked if Jen and Micah want to meet their specific goals?

The rectus abdominis is the front abdominal muscle whose tendinous intersections create the visible “pack” sections. Working it can build strength and muscle definition, though how many sections show also depends on a person’s anatomy and body fat. The transversus abdominis and obliques support the core but do not form the six- or eight-pack pattern.

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