Why do people sport 4-, 6- or even 8-pack abs? | Live Science
Why Arnold Schwarzenegger's Can't Get Six-Pack Abs
Is it true that some people will only ever have 4 or 6 pack Abs, never an 8 pack, no matter how hard they train or how low they reduce their body fat? - Quora
4-Pack Abs: Vs. 6-Pack, Men vs. Women, Exercises, Diet, and More
4 Pack vs 6 Pack vs 8 Pack Abs Explained - Steel Supplements