Photograph by ITAR-TASS Photo Agency / Alamy

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Finnish skier Eero Mantyranta at the IX Winter Olympics in Austria, 1964

Photograph by ITAR-TASS Photo Agency / Alamy

I Ran Faster Because of My "Sports Gene"

The author of the best-selling book tells how DNA has given many athletes—including him—a boost.

Image of the 125 Anniversary logo Back when Eero Mäntyranta was the greatest endurance athlete in the world, there was nothing remarkable about his physical appearance.