Why do people sport 4-, 6- or even 8-pack abs?

The number of washboard abs you can show is determined by your DNA, according to research.

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腹筋の数と遺伝：4パック、6パック、8パックはDNAが決める？】腹筋は遺伝で数が決まるぞ｜parton

8 Pack vs 6 Pack Abs (THE HARD CORE TRUTH!)

See how an Incan 'Ice Maiden' comes alive in this…

Why do people sport 4-, 6- or even 8-pack abs?

When Six-Pack Abs Are Bad for Your Health - Men's Journal

4 Pack vs 6 Pack vs 8 Pack Abs Explained - Steel Supplements

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