Featuring the proven 80/20 intensity balance described in Fitzgerald and Warden's bestselling book 80/20 Triathlon, IRONMAN® Level 3 training plan will provide you with the same workout structure used by the most successful triathletes in the world. TARGET ATHLETE This plan was created for exceptionally ambitious triathletes willing to invest significant time in reaching their best potential at the IRONMAN distance. It assumes you have previously completed several long-distance triathlons and ...