Is This Plan For You?
This 12-week Half Distance Intermediate plan by GA Endurance is designed for triathletes who already have a solid training background and want a focused progression toward race day with slightly more time for structured development.
It is ideal for athletes who are consistently training across swim, bike, and run, and are ready to follow a performance-oriented system that balances endurance, intensity, and recovery.
If you are looking for a structured and efficient training block that builds toward race-specific performance with control and precision, this plan provides a clear and disciplined pathway.
What You Can Expect
• A complete 12-week structured Half Distance progression leading into race day
• Short but effective base phase with early transition into build and race-specific work
• Balanced progression across swim, bike, and run disciplines
• Strong emphasis on aerobic capacity, consistency, and durability
• Progressive long sessions to build endurance and fatigue resistance
• Structured tempo, threshold, and race-pace sessions introduced progressively
• Bike sessions focused on power control, pacing, and sustained efforts
• Run sessions designed to improve efficiency and performance under fatigue
• Swim sessions including aerobic conditioning and sustained efforts
• Integrated brick sessions to develop race-specific adaptation and transitions
• Strategically managed recovery weeks to support adaptation and prevent overload
• Clear, easy-to-follow workouts using power, pace, heart rate, or perceived effort
• Optional strength guidance to support durability and injury prevention
Coaching & Support
This plan includes Coach Access.
If you have any questions during your training, you can reach out anytime via:
coachsupport@gaendurance.com
Requirements
To start this plan, you should be able to:
• Swim at least 1,200–2,000 meters continuously
• Ride consistently for 2–3 hours
• Run continuously for 50–70 minutes
• Train consistently 4–6 days per week
• Have prior experience with structured triathlon training
A GPS watch, heart rate monitor, and bike power meter are recommended for best results.
Final Note
This 12-week intermediate half distance plan is designed to provide a structured and performance-focused pathway toward race readiness.
With slightly more time for development, the focus remains on execution quality, consistency, and controlled progression. If followed with discipline, this plan will help you build endurance, refine pacing strategy, and arrive at race day confident and ready to perform.
Explore more training plans at GA Endurance
I’m Goksen Cinar, MSc, a sports scientist, national team coach, and founder of GA Endurance. With 25+ years of experience and more than 2,000 athletes coached, I combine sports science, data analysis, and practical endurance coaching. I’m a 4-time IRONMAN 70.3 World Championship qualifier and 4-time full-distance IRONMAN finisher, providing full-time coaching built around each athlete’s goals and life.My coaching philosophy begins with the individual.