This 16-week intermediate Half Ironman training plan is designed for athletes with a solid endurance base who are ready to build speed, volume, and race-day efficiency. The program progressively balances swim, bike, and run volume with targeted intensity, including structured intervals, long endurance sessions, and brick workouts to improve race-specific performance. To get the full benefits of this plan, you will want to have a fitness tracking watch that is compatible with TrainingPeaks.