The Lifestyle Intermediate 44-Week Half IRON Triathlon Training is designed for the Intermediate triathlete who has progressed from the Sprint distance to the Olympic triathlon distance and now desires to attempt the Half IRON distance and can handle a heavier training load. Prerequisite training/base mileage isn't needed as this HALF IRON plan begins with a 12-week specific Half IRON base training plan followed by a 32-week Half IRON training plan. Training is based on heart rate % a Garmin ...