Horse was a freak of nature. SI's sportsman of the year. I remember watching that
Belmont live. Fuk I am old.
In the stretch, Secretariat opened a lead of almost 1⁄16 of a mile on the rest of the field. At the finish, he won by 31 lengths, breaking the margin-of-victory record set by Triple Crown winner Count Fleet in 1943 of 25 lengths.[76]CBS Television announcer Chic Anderson described the horse's pace in a famous commentary:
Secretariat is widening now! He is moving like a tremendous machine!
[78][76] The time for the race was not only a record, it was the fastest 1 1⁄2 miles on dirt in history, 2:24 flat, breaking the stakes record by more than two seconds.[76] Secretariat's record still stands as an American record on the dirt.[79] If the Beyer Speed Figure calculation had been developed during that time, Andrew Beyer calculated that Secretariat would have earned a figure of 139, the highest he has ever assigned.[44][80]
Secretariat's heart probably weighed 22 pounds (10.0 kg), or about 2.5 times that of the average horse (8.5 pounds (3.9 kg)).[135]
An extremely large heart is a trait that occasionally occurs in Thoroughbreds, hypothesized to be linked to a genetic condition, called the "x-factor",
passed down in specific inheritance patterns.[135][136][137] The x-factor can be traced to the historic racehorse Eclipse, who was necropsied after his
death in 1789. Because Eclipse's heart appeared to be much larger than other horses, it was weighed, and found to be 14 pounds (6.4 kg), almost
twice the normal weight. Eclipse is believed to have passed the trait on via his daughters, and pedigree research verified that Secretariat traces in his dam line to a daughter of Eclipse. Secretariat's success as a broodmare sire has been linked by some to this large heart theory.[135] However, it has not been proven whether the x-factor exists, l