I have heard about people talk about "farmer's strength" to reference a very natural functional strength that is earned by the gruelling and diverse physical demands of doing farm labour for a lifetime.

Now people have invented various training regimes to try to reproduce that kind of strength outside of the original farming environment.

Edit - As an aside, it just occurred to me that I am both a functional strength and functional programming proponent (facepalm). Perhaps in the future after people seeking to strengthen their minds through via mental gymnastics, FP will see a renaissance