Diana Nyad is among the older athletes running marathons, scaling mountains and otherwise putting the rest of us to shame.
Diana Nyad, 64, walks toward shore Sept. 2 after completing her 53-hour, historic swim from Cuba to Florida -- the first on record without a shark cage. She's among a variety of older athletes running ultra-marathons, scaling mountains and otherwise putting the rest of us to shame:
iStock / bns124
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