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Avoid these common mistakes when preparing for a marathon

The most common marathon training mistakes: ramping up load too fast, resting too little, neglecting nutrition and having no race plan. What to do in each case.

JPJuanPaCreator of TrainingForever·November 6, 2025

Rapid response: The most common mistakes when preparing a marathon are to increase the volume too fast, to rest little, not to practice race nutrition and to leave at an unreal pace. It progresses gradually (the "10 % rule" is only indicative: in a trial with novel runners it did not reduce the lesions against a slightly greater progression; Buist et al., 2008), it reduces the load in recent weeks (Bosquet et al., 2007) and tests in training what you will eat in race (Thomas et al., 2016).

Introduction

Running a marathon is a feat that requires not only physical endurance, but also meticulous and well-structured preparation. In this section, we will explore the importance of good preparation and the goal of this article, which is to guide you to avoid common mistakes and maximize your performance.

Importance of good preparation

Proper preparation for a marathon is crucial for several reasons. First, it significantly reduces the risk of injury. A well-designed training plan balances the workload with rest periods, allowing the body to progressively adapt to increased physical demand. In addition, good preparation improves performance. By following a structured program, runners can optimize their speed, endurance and efficiency, which translates into a better experience on race day.

Another fundamental aspect is mental strengthening. Running a marathon is both a psychological and physical challenge. Proper preparation includes the development of mental strategies that help runners overcome difficult moments during the race. This may include visualization techniques, goal setting and stress management.

Finally, a complete preparation addresses nutrition and hydration, essential elements to maintain energy and health during training and race.

Objective of the article

The aim of this article is to provide a complete guide to avoid common mistakes when preparing a marathon. Often, runners, especially beginners, make mistakes that can negatively affect their performance and enjoy the race. These errors can range from overloading training to ignoring the importance of proper nutrition.

Throughout this article, we will break down the most frequent errors and offer practical and evidence-based solutions to correct them. In addition, we will share good practices and expert advice that will help you optimize your preparation.

In short, this article seeks not only to identify and correct errors, but also to inspire brokers to adopt a more conscious and strategic approach in their preparation. In doing so, we hope that each reader can enjoy the marathon experience to the fullest, reaching his personal goals and discovering the true pleasure of running.

Common errors

Preparing for a marathon is a challenge that requires dedication, planning and knowledge. However, even the most experienced brokers can fall into common mistakes that can affect their performance and increase the risk of injury. Below, we analyze some of the most frequent errors and how to avoid them to ensure successful preparation.

Training overload

One of the most common mistakes when preparing a marathon is training overload. Many runners, in their eagerness to improve quickly, tend to increase the intensity and volume of their trainings too soon. This can lead to overuse injuries, such as plantar fasciitis or tendinitis.

Tip: Follow a progressive training plan adapted to your fitness level. Be sure to include days of rest and active recovery sessions to allow your body to adapt and strengthen.

Ignoring adequate nutrition

Nutrition plays a crucial role in the performance of a broker. Ignoring a balanced and adequate diet can affect your energy, recovery, and overall health. Many runners underestimate the importance of a diet rich in carbohydrates, proteins, and healthy fats.

"Nutrition is as important as physical training.

Make sure you consume enough calories to meet the demands of your workout and include a variety of nutrient-rich foods.

Not getting enough rest

Rest is an essential part of training that is often overlooked. Lack of adequate rest can lead to chronic fatigue and poor performance. During rest, the body repairs and strengthens the muscles, which is crucial to improve endurance and prevent injuries.

Tip: It incorporates at least one full day of rest a week and considers the possibility of including active recovery techniques, such as yoga or light swimming, to maintain flexibility and reduce muscle stress.

Lack of race planning

Race planning is fundamental to success in a marathon. Many runners do not spend enough time planning their race strategy, which can result in too fast a start or poor management of pace and energy.

To avoid this error, it is important to practice your race strategy during long workouts. This includes determining the right pace, planning hydration and nutrition points, and familiarizing yourself with the marathon tour.

In short, avoiding these common mistakes can make a big difference in your preparation for a marathon. By following a balanced and well-planned approach, you will maximize your chances of success and enjoy the training process.

Good practices

Preparing for a marathon is not just a matter of running long distances; it involves a series of well-structured practices that ensure you get to the day of the race in your best physical and mental form. Below, we explore the best practices essential to avoid common mistakes and optimize your preparation.

Planning of a training programme

A well-designed training program is the cornerstone of successful marathon preparation. This should be customized according to your level of experience, current physical state and personal goals.

  • Gradual progression: Increase the distance and intensity of your workouts progressively. The ‘10 % rule’ is an indicative reference, not a guarantee against injury.
  • Variety in training: It incorporates different types of races, such as long races, speed trainings, and recovery sessions. This not only improves your endurance and speed, but also keeps the training interesting.
  • Follow-up and adjustment: Use tracking tools, such as mobile apps or wearable devices, to monitor your progress. Adjust your program according to the data collected and how your body responds.

Importance of rest and recovery

Rest is as crucial as active training. Without proper recovery, the risk of injury increases and performance decreases.

Tip: Schedule at least one full day of rest a week and consider including download weeks every three to four weeks to allow optimal recovery.
  • Restorative dream: Make sure you sleep between 7 and 9 hours per night. Sleep is the moment when the body recovers and strengthens.
  • Active recovery techniques: Includes low impact activities, such as yoga or swimming, that promote blood circulation without adding additional stress to your muscles.
  • Recovery therapies: Consider sports massages and the use of foam rollers to relieve muscle tension and improve flexibility.

Suitable nutrition for brokers

Nutrition plays a key role in the performance of a broker. A well-planned and balanced diet provides the energy needed for training and recovery.

  • Essential macronutrients: Make sure you consume an adequate proportion of carbohydrates, proteins and fats. Carbohydrates are the main source of energy, while proteins help in muscle repair.
  • Micronutrients and supplements: Do not neglect the intake of vitamins and minerals. In some cases, supplements may be needed, but always consult with a sports nutritionist before incorporating them.
  • Meal planning: Design a meal plan that aligns with your training sessions. Eating properly before and after running maximizes performance and recovery.

Hydration strategies

Hydration is critical to maintain performance and prevent health problems during training and running.

  • Daily hydration: Maintain adequate fluid intake throughout the day, not just during exercise. Clear urine is a good indicator of adequate hydration.
  • During training: Learn to drink according to your individual needs. This may involve carrying water or isotonic beverages during longer runs.
  • Test and adjustment: Experience different hydration strategies during your workouts to find what works best for you. Avoid trying something new on race day.
Implementing these good practices will help you avoid common mistakes and effectively prepare for your marathon.

Expert councils

Preparing for a marathon is a task that requires dedication, knowledge and a well-defined strategy. In this section, we will share expert advice that will help you optimize your preparation and avoid common mistakes. These tips focus on three key areas: the choice of appropriate footwear, the importance of health testing and motivational techniques.

How to Choose the Right Shoes

Shoes are one of the most critical elements for any racer. Choosing the right shoes not only improves performance, but also prevents injuries.

  1. Know your kind of footstep: Before buying shoes, it is essential to know if you have a pronator, supinator or neutral tread. Many specialty stores offer free tread analysis.
  2. Try different models: Do not limit yourself to a single brand or model. Try several options and make sure the shoes fit comfortably to your foot. Remember that the adjustment must be firm but not tight.
  3. Consider cushioning: The amount of damping required varies according to the type of race and the surface. For marathons, look for a balance between cushioning and lightness.
  4. Renew your shoes regularly: Weared shoes can increase the risk of injury. It is generally recommended to change shoes every 500-800 kilometers.

The importance of health tests

Before embarking on a marathon training program, a complete medical evaluation is essential. This not only ensures that you are in optimal running conditions, but also helps you identify any health problems that may require attention. Here are some tests you should consider:

  • Cardiovascular evaluation: A heart check is crucial to detect any abnormalities that may put your health at risk during training or running.
  • Blood tests: A blood test can reveal nutritional deficiencies that could affect your performance, such as low iron levels or vitamins.
  • Stress tests: These tests help determine your aerobic capacity and establish appropriate training zones.
Expert Tip: Do these tests at least once a year or before starting a new training cycle.

Motivation techniques

Motivation is a key component in preparing for a marathon. Staying motivated for months of training can be a challenge, but with the right techniques, you can maintain focus and determination:

  • Sets clear targets: Define specific and achievable goals for each phase of your training. This will help you stay focused and measure your progress.
  • Positive display: Spend a few minutes each day to visualize you crossing the finish line. This technique can increase your confidence and reduce anxiety.
  • Find a training partner: Running with a friend or group can make training more enjoyable and provide you with a support system.
  • Record your achievements: Keep a training journal where you can write down your achievements and reflect on your experiences. This will allow you to see how far you have advanced and motivate you to move on.
With these expert advices, you will be better prepared to face the challenges of preparing for a marathon. Remember that each racer is unique, so it is important to adapt these tips to your personal needs and circumstances.

Checklist before the marathon

  • You've completed several long runs without bother.
  • You've had gels, drinks, and breakfast in practice.
  • You have a realistic objective pace, based on your workouts.
  • You've reduced the load in the last few weeks.
  • You know the route and the supplies.

"The mistake I see the most is wanting to recover in two weeks what has not been trained in two months. That's when the injuries appear." — Marc Bañuls, coach with more than 15 years of experience

Frequently Asked Questions

Does it serve the 10% rule?

It's an orientation reference. In a novel racer trial, a more gradual progression did not reduce the lesions; it matters more to adjust the load to each racer.

How long does it take to prepare for a marathon?

Preparation for a marathon is a process that varies significantly between runners, depending on their level of experience, current physical condition and personal goals. In general, a training period of between 16 and 20 weeks for beginners is recommended. This time allows to gradually develop the endurance necessary to complete the 42,195 kilometers of a marathon without compromising health.

During this period, it is crucial to follow a structured training plan that includes a combination of long runs, speed training and rest days.

What to do if I get hurt during training?

Injuries are a common concern for runners, especially during preparation for a marathon. If you experience an injury, the first thing is to evaluate its severity. For minor injuries, such as cramps or mild muscle aches, it is advisable to apply the RICE method (Repose, Ice, Compression, Elevation) and reduce the intensity of training.

Tip: Listening to your body is essential. Ignoring pain can lead to more serious injuries.

For more serious injuries, such as sprains or stress fractures, it is essential to seek professional medical care. A physical therapist or sports doctor can provide an accurate diagnosis and an adequate recovery plan.

Is there a need for a personal coach?

Having a personal coach is not strictly necessary, but it can be highly beneficial, especially for beginners or those looking to improve their performance. A personal coach can offer:

  • Custom training plans: Adapted to your specific needs and objectives.
  • Technical correction: It helps improve the way you run, reducing the risk of injury.
  • Motivation and support: Maintaining motivation during training is crucial, and a coach can provide the necessary stimulus to move forward.
While not indispensable, having a coach can make a significant difference in your race experience and success.

In short, preparing for a marathon is a personal journey that requires time, dedication and often proper guidance. Whether you choose to train on your own or with the help of a professional, the important thing is to maintain a balanced approach and listen to your body at all times.

Read also

Sources

  1. Buist I, et al. No effect of a appreciated training program on the number of running-related injuries in novice runners: a randomized controlled trial. Am J Sports Med. 2008;36(1):33-9.
  2. Bosquet L, Montpetit J, Arvisais D, Mujika I. Effects of covering on performance: a meta-analysis. Med Sci Sports Exerc. 2007;39(8):1358-65.
  3. Thomas DT, Erdman KA, Burke LM. Nutrition and athletic performance (ACSM/AND/DC position). Med Sci Sports Exerc. 2016;48(3):543-68.
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Written by
JuanPa

Creator of TrainingForever.

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