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GA Endurance | Half Marathon Intermediate | 40 Weeks | Structured Plan | Coach Access

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GA Endurance | Half Marathon Intermediate | 40 Weeks | Structured Plan | Coach Access

Includes Structured Workouts

Structured Workouts automatically sync with compatible devices and guide you through workouts in real time.


Learn More about Structured Workouts.

Author

GA Coaching

All plans by this Coach

Length

40 Weeks

Includes Structured Workouts

Structured Workouts automatically sync with compatible devices and guide you through workouts in real time.


Learn More about Structured Workouts.

Plan Description

Is This Plan For You?

This 40-week Half Marathon Base plan by GA Endurance is designed for runners who want a complete, long-term development system built on precision, consistency, and sustainability.

It is ideal for intermediate athletes who can comfortably run 8–12 km and are ready to commit to a fully structured progression that develops aerobic capacity, pacing control, and endurance durability over time.

If you are looking to build your performance properly—without shortcuts—this plan provides a comprehensive and highly structured pathway.


What You Can Expect

• A complete 40-week Base progression designed for long-term development

• Gradual and highly controlled increase in volume with precise intensity management

• Strong emphasis on aerobic capacity, steady-state strength, and fatigue resistance

• Long and structured steady sessions to improve pacing stability and endurance durability

• Integrated testing phases to track progress and recalibrate training zones throughout the plan

• Clear, easy-to-follow workouts using pace, heart rate, or perceived effort

• Optional strength guidance to support injury prevention and long-term consistency


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:

• Run continuously for at least 8–12 km

• Train consistently 4–5 times per week

• Have prior structured training experience

• Be committed to a long-term, progressive training process

A GPS watch or heart rate monitor is strongly recommended for best results.


Final Note

This 40-week Base plan is not just a training block—it is a complete development system.

Over time, you will build a highly efficient aerobic engine, improve pacing precision, and develop exceptional endurance durability.

This long-term approach allows for deeper adaptation, reduced injury risk, and a more stable transition into race-specific training phases.

Explore more training plans at GA Endurance

How it Works

Load Your Plan

Quickly view upcoming workouts in the TrainingPeaks app.

Workout and Analyze

Upload completed workouts from your favorite tracking app or device.

Track Your Progress

Get feedback, stay on top of your training and perform at your best.

Learn More

Training Plan Sample Week

Stats

Average Weekly Breakdown

Workouts Weekly Average Longest Workout
Run x5
03:54:00 02:00:00
Day Off x2
—— ——
Workouts Per Week Weekly Average Longest Workout
Run
03:54:00 02:00:00
Day Off
—— ——

Training Load By Week


This plan works best with the following fitness devices:

  • Heart Rate Monitor

All supported devices

GA Endurance

GA Coaching & Sports Science

Goksen Cinar, MSc, and Ozgur Axaman, combining decades of coaching experience with applied sports science. Both are multiple-time Ironman 70.3 World Championship qualifiers, with extensive full-distance Ironman experience. Their system integrates structured training, data-driven methodology, and real-world coaching to help athletes train with clarity, consistency, and long-term performance focus.


  • This plan includes a Free Basic TrainingPeaks Account.
  • Access your training plan anywhere on the TrainingPeaks mobile and desktop apps.
  • Track your performance with robust data tracking and detailed graphs.
  • Plan for your event in the TrainingPeaks calendar.
  • Track your weight, sleep, hours, fatigue and stress while you train.
  • Completed workouts sync with popular apps like Garmin and Wahoo. Learn More
  • If plan includes Structured Workouts, then planned workouts sync to compatible devices and guide you through workouts in real time. Learn More

Refund Policy

This plan is protected by our Refund Policy and may, with the author's approval, be exchanged for a plan of equal value from the same author.

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