Diana Nyad is among the older athletes running marathons, scaling mountains and otherwise putting the rest of us to shame.
Merlene Ottey (53) -- She’s been to the Olympics more than any other track and field athlete in history (seven times) and in 2010, Ottey became the oldest athlete ever to compete in the European Athletics Championships. There, she shattered her previous record for fastest 100 meters by a female over 50.
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