Are you looking for a 1:45 half marathon training plan for your next big goal? At an average pace of 4:58 per kilometer, running a half marathon in 1:45 is a major milestone in any runner’s progression.
This target is often the next step for runners who already have a few races under their belt and want to level up. Running 1:45 for the half marathon takes solid endurance, consistent training, and a plan that matches your current fitness.
In this article, discover our 12-week 1:45 half marathon training plan, the paces to follow, the key workouts to prioritize, and our best tips to give yourself every chance of success on race day.
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What fitness level do you need to run a 1:45 half marathon?
The 1:45 half marathon training plan is designed for runners who already train regularly. You do not need to be an expert, but it is best if you have been running several times a week for a few months and have already taken part in a few races.
In general, runners aiming for a 1:45 half marathon can run between 30 and 50 kilometers per week and usually have a 10K time between 47 and 52 minutes.
More than pure speed, consistency is what really makes the difference. A runner who trains seriously for at least 12 weeks will often have a better chance of hitting the goal than a faster runner who is less consistent.
What pace do you need to hold for a 1:45 half marathon?
To finish your half marathon in 1:45, you will need to hold an average pace of 4:58 per kilometer over the full 21.1 km.
That pace can feel comfortable over the first few kilometers, but it becomes more demanding as the race goes on. That is why a strong half marathon training plan needs to include different training intensities.
Easy run sessions build your overall endurance. Threshold workouts improve your ability to sustain a hard effort. Finally, half marathon pace sessions help you lock in the rhythm you will need on race day.
Week after week, that 4:58/km pace will start to feel more and more natural.
How many weeks do you need to run a 1:45 half marathon?
Most runners prepare for a 1:45 half marathon over a period of 10 to 12 weeks.
This gives you enough time to build the required fitness gradually while limiting the risk of injury. It also leaves enough room to include long runs and specific workouts at goal pace.
If you are already coming off a consistent training block, a shorter build-up can sometimes be enough. On the other hand, if you are coming back after several weeks off, it is better to allow a few extra weeks before starting the specific plan.
Key workouts in a 1:45 half marathon training plan
A good 1:45 half marathon training plan is built around several complementary types of workouts.
Easy runs are the foundation of the preparation. They improve cardiovascular fitness, strengthen your muscles progressively, and help you recover between harder sessions.
Threshold work also plays an important role. These workouts improve your resistance to fatigue and help you handle sustained paces more effectively.
The half marathon pace sessions are probably the most important. They teach you how to run at 4:58/km without redlining and how to manage your effort.
Finally, long runs remain essential. They build the muscular and mental endurance you need to perform well over the 21.1 km race distance.
12-week 1:45 half marathon training plan
This half marathon training plan is designed for a runner who can train four times per week. It alternates endurance sessions, speed work, specific pace training, and long runs to gradually build the fitness you need to reach your goal.
The goal is not to nail every workout perfectly. What matters most is consistency across the whole training block. Missing a few sessions will have little impact if you keep a coherent training rhythm over several weeks.
Before you start your build, you can do a vVO2max test to identify the right easy run, threshold, and vVO2max paces, and avoid overloading your body.
How should you manage your half marathon on race day?
Even with the best half marathon training plan, race execution is still a key factor.
The most common mistake is starting too fast. The atmosphere at the start, the adrenaline, and the freshness of the first few kilometers can make goal pace feel easy. But things change quickly after 15 km.
The ideal approach is to stay close to your planned pace from the start. If you feel good in the final kilometers, you can always speed up gradually.
Patience is often one of the most important qualities for a successful half marathon.
Nutrition and hydration: the details that matter
As you improve in running, the details matter more and more.
During the weeks leading up to your half marathon, make sure you keep a balanced diet and recover well after your key workouts.
On race day, avoid experimenting with anything new. Your breakfast, drinks, and energy gels should all have been tested in training.
The long runs in your training plan are the perfect opportunity to test and validate your nutrition strategy.
Mistakes to avoid during your preparation
Many runners have the fitness needed to run a 1:45 half marathon but still fall short because of a few classic mistakes.
The first is running every workout too fast. Easy runs should stay easy so your body can absorb the training, make the right physiological adaptations, and recover properly.
The second mistake is neglecting long runs. They are a central part of any half marathon training plan.
Finally, trying to make up for a missed session by suddenly increasing training volume is rarely a good idea. It is better to simply resume the plan where you left off.
Why choose a personalized training plan?
Every runner has their own rate of progress. Your schedule, sporting background, injury history, and current fitness all directly influence your preparation.
A half marathon training plan that is personalized to your goal allows you to adapt each workout to your profile and constraints so you can improve more effectively.
With RunMotion Coach, your plan updates automatically based on the training you complete, your current fitness, and your sporting goals. Download the RunMotion Coach app to get your personalized half marathon training plan.
FAQ: 1:45 half marathon training plan
What 10K time do you need to run a 1:45 half marathon?
Most runners who run a 1:45 half marathon have a 10K time between 47 and 52 minutes.
Can you follow a 1:45 half marathon training plan with 3 sessions per week?
Yes, a half marathon training plan can be adapted to three sessions per week. That said, four sessions usually make progress more comfortable.
What vVO2max do you need to run a 1:45 half marathon?
A vVO2max between 15 and 16 km/h is often a good foundation for aiming at this goal.
How many kilometers should you run each week?
Most runners cover between 30 and 50 kilometers per week.
What pace do you need to hold to run a 1:45 half marathon?
To run a 1:45 half marathon, you need to hold an average pace of 4:58 per kilometer over the 21.1 km race distance.