
Kenyan flag
Here’s a headline from a Chicago news source:
“Kenyan man, Russian woman win Chicago Marathon titles”
Here’s another from a Boston paper:
“Kenyan, Russian Post Fastest Times at Boston Marathon”
And another:
“Kenyan wins White Rock Marathon; Russian runner wins women’s race”

Kyrgyzstani flag
Soooo… Nature or nurture?
Here’s one blogger’s take:
Many believe this is because of the high altitude at which Kenyans and Ethiopians train, although these countries also have a robust running culture as well as highly trained regimes … Additionally, the fact that so many Kenyans and Ethiopians have witnessed their fellow citizens travel overseas and win thousands of dollars in marathon money has been a further encouragement to rigorously train in order to become the best at marathon running. This has led domestic competition to drastic levels in order to determine who is the best to compete internationally.
As for the Russian women. Your guess is as good as mine. Maybe the Soviet legacy of athleticism is alive and well, and distance running has replaced hockey and Greco-Roman wrestling. I’ll think on it and let you know.