IronFit Secrets to Half Iron-Distance Triathlon Success does for the half-iron what Be IronFit has done for the full-iron. It provides three sixteen-week training programs—Competitive, Intermediate, and “Just Finish”—and details everything an athlete needs to know to successfully prepare for and maximize performance at this racing distance. In as little as four months, any athlete can be physically and mentally ready for the world’s most popular triathlon challenge.