And to add another footnote about Alexander Karelin, I found this on a search:
He competed at the heaviest weight class of his day, 130 kg (286 lb). His conditioning, quickness, and incredible physical stature for his weight, perhaps combined with his dominance of the sport, led to him being known as "The Experiment" by much of the rest of the world. The term connoted the notion that his strength and skill were the result of some kind of scientific experiment. When asked why he thought he was called that, Karelin noted that others don't understand because "I train every day of my life as they have never trained a day in theirs."
That's a sig-worth quote right there.