DEL_3421 By Liz HichensPublished Jun 30, 2010 comments Tweet Share << Back to StoryOpen full size in new window.Your level of endurance can make a big difference in the final miles of the Ironman marathon. Photo: Delly Carr ©Delly Carr / Sportshoot Liz HichensLiz Hichens is the Web Producer of Triathlete.com. She is an Ironman and marathon finisher and fan of all endurance sports.Follow @lizhichensAll articles by Liz