This Half-Iron build and peak period plan was created by British Triathlon Certified Coaches. It is best started about 11 weeks prior to your A-priority Half-Iron race. Following this plan will have you ready for an exceptional performance.
This plan is intended for the intermediate to advanced triathlete. To start this plan you should be able to swim 1 hour, bike 3 hours, and run 2 hours. Weekly volume is about 13 hours per week with 3-4 swims, 4 bikes, 4-5 runs and 1 strength session. The exceptions are the rest and recovery weeks every fourth week with volume significantly reduced for 4 to 5 days and self-testing at the end of the week to measure progress. There are also fitness-building race-simulation bricks every week. The last 3 weeks of this plan taper and peak you for the race.
The plan uses common triathlon language to describe the workouts and is easy to follow. By the end of 11 weeks you will have excellent Half-Iron race fitness.