The Lifestyle Intermediate 36-Week Full IRON Triathlon Training Plan is designed specifically for intermediate triathletes like you—those who have mastered the shorter distances and now dream of crossing the Full IRON finish line. This structured, heart rate-based plan eliminates guesswork, providing you with a progressive, science-backed approach to build strength, endurance, and race-day confidence. Even if you haven't trained in the last 90 days, this plan is designed to meet you where you ...