Mankind has been running for centuries. In prehistoric times, we ran for survival. In today's modern world, we run for fitness, competition, and achievement. Coach Paul Greer has had an illustrious career as both a runner and a coach. He has run the mile in under four minutes, was a 1992 U.S. Olympic Trials qualifier, and competed in the European track circuit as a post collegian. In 2016 he was selected to be the Men's Coach for Team USA's...