Duncan Larkin has covered the sport of running for more than a decade. He's a certified Army Master Fitness Trainer and was a top-300 American marathoner back in 2006. He has won the Himalayan 100-Mile Stage Race and the Mohawk-Hudson Marathon. His first book, Run Simple, was published in 2012. Duncan writes about fitness for Outside Magazine, Competitor Magazine, Runner's World, ESPN, and Running Times.
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