Did you know that Secretariat had a heart that weighed 22 lbs? The typical thoroughbred heart weighs like 7-9 lbs. Sorry had to give a bit of trivia, I work for a horseracing website and LOVE the sport.
Yes, I heard Secretariet's heart described as 2.5 times normal size.
There’s nothing wrong with trivia from someone who loves his subject.
In humans an enlarged heart is not a good thing, apparently it wasn’t the case with Secretariat. I’m only a casual watcher of the sport, but even a casual fan had to find Secretariat about as exciting as sport can get.