Half Marathon | 12-Week Intermediate Performance Plan

Improving your half marathon performance requires a shift from simply running miles to training with a specific purpose. This 12-week plan is designed for intermediate runners who want a professional structure to reach a new personal best. It provides a clear path to build the stamina and pace needed for the 21.1km distance. By following a methodical system, you can balance your preparation with a demanding career, ensuring every session counts toward race day success.

Consistency is built through a manageable routine. This plan focuses on four purposeful runs per week, allowing for high-quality work followed by recovery. You will move through a structured build that increases your ability to hold a faster pace for longer. This framework removes the stress of planning and second-guessing your training, giving you the confidence that your preparation is grounded in sound principles. Every hour you spend training is used effectively to build the resilience needed for a successful race.

How This Helps You

• Clear Direction: A professional schedule that tells you exactly what to do each day, removing decision load.


• Pacing Knowledge: Guidance on how to manage your effort so you can sustain your target speed throughout the race.


• Technique: Simple points to help you move more easily, which is essential for maintaining form when tired.


• Resilience: A weekly strength session designed to help your body stay strong and handle the demands of faster running.


• No Guesswork: Every workout is prescribed using your personal targets to ensure the work is appropriate for your fitness.

Your 12-Week Roadmap

• Weeks 1-4: Base. Establish your current targets and build a solid foundation of stamina.


• Weeks 5-8: Development. Push your limits with threshold efforts and increased distance to build strength.


• Weeks 9-12: Performance. Hone your race pace and follow a taper to ensure you feel fresh on race morning.

Is This Your Next Step?

• Intermediate Runners: You can run for 90 minutes comfortably and want a professional path to a personal best.


• PB Chasers: You want a reliable plan to feel more capable and confident over the 21.1km distance.


• Structure Seekers: You want a 4-run weekly schedule that fits into a busy lifestyle without being overwhelming.

Your Deliverables

• 12 weeks of training syncing to TrainingPeaks for clear guidance on your watch every day.


• 4 purposeful runs per week including easy efforts, interval sessions, and weekly long runs.


• 1 integrated strength session per week focused on stability and mobility to keep you running strongly.


• 3 essential rest days every week to facilitate recovery and help you stay consistent.


• Coach support via email for help with your sessions or practical training advice.

View other Half Marathon Plans Here

The Professional Approach

Success is the result of a consistent system. By following a plan grounded in science and clear structure, you can focus on execution. This provides the clarity required for a meaningful result.