Amby Burfoot is editor at large for Runner's World magazine, RW Newswire online contributor, and 1968 Boston Marathon winner

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@exerscience — 16,295 followers, 1,342 tweets

Jul 27, 2017

@maartjevz I'm trying to understand Play Your Run. Can you help? Amby Burfoot, Runner's World USA, amburf@gmail.com