Featuring the proven 80/20 intensity balance described in Fitzgerald and Warden's bestselling book 80/20 Triathlon, IRONMAN® Level 0 training plan will provide you with the same workout structure used by the most successful triathletes in the world. TARGET ATHLETE This plan is designed to enable first-time Ironman participants and even first-time triathletes to finish strong in an Ironman event. Before you begin, you should be comfortably able to swim and run for 45 minutes, cycle for 60 ...