No matter your age, no matter your fitness level, you can run... again. It is the purest form of exercise and all you need is a good pair of sneakers and the ability to put one foot in front of the other. A conversation with Dan Williams, who died on the operating table twice during open heart surgery at 62. He not only survived but he became an All American Masters Athlete and is still competing at age 72.

Be sure to visit Dan's website at https://www.newheart4life.com/home

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Music for "Upside of 40 with Sean Mooney" is provided by Immune System. To hear more from Immune System, head to http://immunesystem.bandcamp.com