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Training Secrets Of Some Of The Olympic's Oldest Runners

On Sunday, 41-year-old Meb Keflezighi will represent the United States in the men’s marathon at the Rio Olympics.

Keflezighi is the only runner in the world to have won both the Boston and New York City Marathons and an Olympic medal, and he’s set to make his fourth Olympic appearance in a grueling sport from which many athletes burn out in their 20s.

The secret to his continued longevity, he told Outside magazine, is not going the extra mile.

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