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Switzerland’s Daniela Ryf dominated the women’s race at the 2016 Ironman World Championship, putting together a 52:50 swim, 4:52:26 bike and a 2:56:51 marathon to establish a new course record of 8:46:46 and defend the Kona titles. Here she chats about overcoming pre-race doubts, racing up front all alone and breaking the course record.