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 / MartiSaiz
Sign up for Breaking News, Daily Headlines, Severe Weather Alerts & more!