Well, I don't have the link, but he went on about how he shared a particular structural Irish build with his countrymen/women -and he detailed it from head to toe! - and described it as troll-like and said 18" calves was a common feature. Now knowing a bit about Luke and his penchant for xenobiology, I took it tongue-in-cheek. But he might have been serious.
I know teh type. And yes there are so many short stocky troll like people.
My friend who i work with has 19" calves. Never trained them in ghis life. He is 5'6 and so thickly built and set its unreal. Massive wrists forearms teh lot. That is one tpe.
Anothe rcommon type of person is teh typical celt. short and stiocky but fdast and robust. My dad is like this.