The Lifestyle Beginner 36-Week Half IRON Triathlon Training is designed for the beginning triathlete who has progressed from the Sprint to the Olympic triathlon distance and now desires to attempt the Half IRON distance, and yet hasn't completed any endurance training in the last 90 days. NO prerequisite training is required as this Half IRON plan begins with a 12-week base plan followed by a 24 week specific Half IRON training plan. Training is based on heart rate % so a Garmin type of ...