Diana Nyad — American Author born on August 22, 1949,

Diana Nyad /ˈnaɪˌæd/ is an American author, journalist, motivational speaker, and long-distance swimmer. Nyad gained national attention in 1975 when she swam around Manhattan and in 1979 when she swam from North Bimini, The Bahamas, to Juno Beach, Florida. In 2013, on her fifth attempt and at age 64, she became the first person confirmed to swim from Cuba to Florida without the aid of a shark cage, swimming from Havana to Key West. Nyad was also once ranked thirteenth among US women squash players... (wikipedia)

Swimming is probably the ultimate of burnout sports. It's ironic because millions of people who swim as their regular exercise love the meditation aspect of it; you don't wind up with any orthopedic injuries. But when you swim at a world class level for hours and hours - the loneness of the long distance runner.
When I walk up on that shore in Florida, I want millions of those AARP sisters and brothers to look at me and say, 'I'm going to go write that novel I thought it was too late to do. I'm going to go work in Africa on that farm that those people need help at. I'm going to adopt a child. It's not too late, I can still live my dreams.'
But for each of us, isn't life about determining your own finish line?
Write that novel. Start that business you've always wanted to. The ultimate high of life is the commitment to pursuing something.
For previous generations, swimming the English Channel was the feat to accomplish. And that's been done.