Fytgytgttggtgt wrote:
he has slowed down the aging process dramatically (using "whatever")
He needs to share with the medical community the "whatever"
Genetic predisposition to very long life. People that live well beyond 100 usually get there the same way - very slow aging. When they're 60 they look 40. When they're 90 they look and act like 60.
In gene pools where the population isn't high enough to create selective pressure for a short lifespan, and the death rate from accidents and diseases selects for long natural lifespan, you'll find lots of people who age very slowly. This is typical of undeveloped places where people live in villages with little technology. Swedish records list countless people who lived into their 80's or 90's in the 17th and 18th centuries.
Caloric restriction is also a factor in long lifespan, and Kenya is one of the hungriest countries in the world.
Why aren't there more Kenyans continuing elite careers beyond 40, I would venture that they are so rich by Kenyan standards that they'd rather quit and enjoy themselves. As an American, Lagat is not so rich, he's not going to build a big farm or a hotel and have 15 children and make his village prosperous. He might as well keep running.