12-week half marathon training plan

If you want to understand in depth how to prepare for a half marathon (times, distance, mistakes and strategy), you can consult our Complete guide on how to prepare for a half marathon.

In this article you will find a 12-week half marathon training planDesigned to help you prepare for distance running in a progressive and structured way. It is a guide intended to help you...redpray and heartredhours that are already capable of completing some 10 kilometers comfortably and with a certain degree of ease, and who want to make the leap to the 21 kilometers with guarantees.

This half-marathon training plan combines easy runs, quality sessions, long runs, and recovery periods to develop the endurance needed to tackle a half-marathon with confidence. The progression of volume and intensity is designed to allow the body to gradually adapt to the effort required for this distance.

Like any general planning, this half marathon training plan It must be adapted to the characteristics, experience, and availability of each corredor or corredNow. Use it as a reference structure to organize your next 12 weeks of preparation and arrive on race day in the best possible condition.

Before starting the plan: important recommendations

Before starting this 12-week half marathon training plan, it's important to consider some basic aspects that can make a difference in your preparation.

It starts with a minimum training base

This plan is designed to corredpray and heartredhours that can already run toredodor of 10 kilometers continuously and comfortablyIf you don't yet have that base, it's best to consolidate that distance first before starting specific training for the 21 kilometers.

Listen to your body

The training progression is designed to gradually increase the workload, but everyone responds differently to training. If you experience excessive fatigue, discomfort, or poor recovery, it's advisable to adjust the volume or intensity of your sessions.

Prioritize consistency over intensity

Consistency is one of the most important factors in preparing for a half marathon. It's better to train regularly for several weeks than to do very demanding sessions on a few occasions.

Respect rest and recovery days

Rest is also part of training. It allows the body to adapt to the workload and redIt increases the risk of injury.

Adapt the plan to your availability

This program is a indicative training structureTherefore, you can adjust it to your personal schedule, experience, or feelings during preparation.

12-week training plan for a half marathon

And now, here's a sample 12-week training plan for a half marathon. The progression combines easy runs, quality sessions, and long runs with the goal of improving endurance and building confidence on race day.

Weeks 1-4: Foundation Building

During these first few weeks the aerobic base is built which will allow the rest of the training to be sustained.

• 2 easy rides (6-8 km)
• 1 long progressive run (10-12 km)
• 1 optional strength session

In this phase:

• Comfortable and conversational pace (I work in Z2 or VT1).
• Do not prioritize speed.
• Introduce compensatory (strength) core and lower body work.

Weeks 5-8: Introduction of quality

This section introduces quality work for improve the eficiency and begin to approach the competition rhythmsystem. (Z3-Z4 or VT2).

• 1 smooth rolling
• 1 session of changes of pace (e.g., 5×1000 m, Fartlek by time)
• 1 medium run (10-12 km)
• 1 long run (14-16 km)

Here begins the specific work:

• Pace close to the race target.
• Learning to manage accumulated fatigue.

Weeks 9-11: Specificity

Here the training becomes more specific, with sessions focused on replicate the real demands of the race.

• Long sets (3×3000 m, 2×5000 m)
• Controlled filming at target pace
• Maximum long run (18-19 km)

Quite the opposite of what many people thinkredpray and heartredOras believe, It is not necessary to complete the 21 km in trainingThe physiological adaptation will already be built if the plan has been progressive.

Week 12: Tapering or “fine-tuning”

This last week is focused on redto increase the load and arrive on race day with good feelings and without accumulated fatigue.

• Redincrease the volume by 40-50%
• Maintain some intensity
• Prioritize rest and sleep

The most common mistake when reaching week 12, especially in the case of beginners, is overtraining due to insecurity; the last week of preparation for the race should prioritize rest and recovery to arrive fresh on race day.

Conclusion

Preparing for a half marathon is a gradual process that requires time, consistency, and proper planning. A 12-week half marathon training plan allows you to develop the necessary endurance to tackle the 21 kilometers with greater safety and confidence.

If you can already complete 10 kilometers with ease, following a training structure like the one presented in this article can help you organize your preparation and gradually make the leap to the half marathon.

Remember that each corredor or corredNow you have a different adaptation rate. Listening to your body, respecting recovery, and maintaining consistency in training are key to arriving on race day in the best possible condition and enjoying the experience of completing the 21 kilometers.

Text to 42K of :

Marcos Greus

Trainer and physical trainer.

Bachelor of Science in Physical Activity and Sports specializing in endurance sports. National triathlon, cycling and swimming coach, as well as long distance specialist coach.
Link to the Marcos Greus website

Other entries by Marcos Greus

• Guide to preparing for a half marathon (21k)
• Warm-up before a fun run: a guide for beginner runners
• 3 basic strength exercises for legs