Preparing for a marathon is a challenge that goes far beyond mere running training. Besides a structured training plan, nutrition also plays a crucial role in achieving the best possible performance on race day. A targeted nutrition strategy can help to Yincrease performance, reduce muscle fatigue, and enable faster recovery after intense sessions. In this blog post, you will learn you, how you your diet specifically to your body optimally for the 42.195 kilometers to prepare.
A Contribution from our Team Athlete
Why is Nutrition so Important?
Nutrition significantly influences your endurance, your regeneration ability and ygeneral well-being. A balanced diet ensures that Yyour body has enough energy to sustain training and recover quickly after intense sessions. In addition, it protects you from injuries and improves your immune system.
These Factors to Consider!
Carbohydrates are the most important energy source for runners. They are stored as glycogen in the muscles and liver and are available as readily available energy during training and competition. Especially during intense phases of the training plan, carbohydrates should be specifically supplied to regularly replenish stores. Good sources are whole grain products, potatoes, rice, quinoa, oats, and fruit. During long runs, it can be useful to consume fast-acting carbohydrates such as energy gels or dates to keep blood sugar levels stable
Recovery is crucial to sustain training long-term and prevent muscle fatigue. Proteins play a central role here, as they are necessary for muscle building and tissue repair. Especially after intense training sessions, a protein source should be consumed to optimally support the body. Good protein sources include lean meat, fish, eggs, legumes, dairy products, as well as plant-based alternatives like tofu or tempeh. An ideal recovery snack after a run could be a protein shake with banana or yogurt with nuts.
Fluid intake is one of the most important, but often underestimated, factors for optimal marathon preparation. Even a small fluid loss can drastically reduce performance. During training, water should be consumed regularly to avoid dehydration. Additionally, electrolytes such as sodium, potassium, magnesium, and calcium are essential to maintain fluid balance and prevent cramps. Especially after long sessions, an isotonic drink or a salty meal is advisable to replenish lost minerals.
While carbohydrates are the preferred energy source during intense exertion, fat metabolism also plays an important role – especially during long runs at a moderate pace. As the duration of exertion increases, the body increasingly draws on fat reserves to provide energy. An adapted diet can make fat metabolism more efficient. Healthy fats from avocados, nuts, seeds, olive oil, and fatty fish provide valuable omega-3 fatty acids, which have anti-inflammatory effects and support overall health. Especially in the base phase of the marathon training, a conscious consumption of healthy fats can help accustom the body to long-lasting energy production from fat.
Besides macronutrients like carbohydrates, proteins, and fats, vitamins and minerals also play an essential role. Iron is particularly important for oxygen supply to the muscles, which is why iron-rich foods like red meat, legumes, spinach, and nuts should be regularly included in your diet. Magnesium supports muscle relaxation and prevents cramps, while calcium ensures strong bones. Vitamin C can improve iron absorption, while B vitamins are involved in energy production. A varied, fresh diet with plenty of vegetables and fruits ensures that all essential micronutrients are covered.
During a marathon, the body burns large amounts of energy. To keep blood sugar levels stable and ensure muscles continue to function optimally, it's important to replenish energy during the run. Every 30 to 45 minutes, easily digestible carbohydrates should be consumed. This can be in the form of gels, sports drinks, bananas, or dried fruits. However, the tolerability of these products should already be tested during training to avoid digestive problems on race day.
Every body is different, which is why there is no universal marathon diet. While some runners achieve the best results with a carbohydrate-rich diet, others opt for moderate carbohydrate intake and a stronger fat adaptation. It is important to try out different strategies during training and find out which diet works best. In addition, allergies, intolerances, and personal preferences should be considered to ensure optimal nutrition.
Nutrition Phases in Marathon Preparation
1. The Base Phase (3-6 Months before the Race)
In this early preparation phase, you should you focus on a balanced diet to provide your body with all the necessary nutrients long-term. The focus is on creating a stable foundation for the upcoming training.
A constant intake of complex carbohydrates (whole grain products, rice, potatoes, oats) ensures a long-lasting energy supply.
Lean protein sources (legumes, lean meat, fish, dairy products) support muscle building and recovery.
Foods like avocado, nuts, and olive oil provide important fatty acids and have anti-inflammatory effects.
Fruits and vegetables are essential for a strong immune system and fast recovery.
A consistent nutrient intake throughout the day helps to avoid blood sugar fluctuations.
2. The Intensive Phase (6-8 Weeks before the Marathon)
This phase is particularly training-intensive, which is why your diet should be specifically adjusted here. The body now requires increased carbohydrates for energy production and proteins for muscle regeneration.
Increase your carbohydrate intake with easily digestible sources like white rice, quinoa, and sweet potatoes.
Proteins support muscle recovery after long runs. Recommended are fish, eggs, tofu, or protein-rich snacks like nuts.
Sufficient fluid intake is crucial. Supplement water with isotonic drinks or coconut water to replenish electrolytes.
Try out different meals and snacks during training to avoid digestive problems on race day.
3. The Tapering Phase (1-2 Weeks before the Marathon)
In this phase, you reduce your ytraining, while your diet continues to play a key role. The body should fully recover and at the same time be optimally prepared for the race load.
In the last three to four days before the race, you should you increase carbohydrates to yourself, to maximally fill glycogen stores.
Avoid gassy or hard-to-digest foods like beans or fatty dishes.
Drink enough water and make sure to stabilize your electrolyte balance.
Now is not the time to try new foods or supplements.
4. Race Day
On marathon day, a well-thought-out nutrition strategy is crucial. Your body should be optimally supplied with energy without experiencing digestive problems.
Light carbohydrates like oatmeal with banana or toast with honey provide quick energy.
30-60 minutes before the run, you can eat a banana or an energy bar.
Every 30-45 minutes, you should consume carbohydrates in the form of gels, bars, or sports drinks.
Drink regularly to avoid dehydration.
5. The Recovery Phase (after the Marathon)
After the marathon, recovery begins. The right nutrition helps your body to recover faster and prevent injuries.
Immediately after the run, a meal with proteins and carbohydrates should be consumed, e.g., a recovery shake or yogurt with muesli.
Lost minerals can be replaced by isotonic drinks, water, or coconut water.
Berries, nuts, and green vegetables help to reduce inflammation and accelerate recovery.
Conclusion
A targeted nutrition is a crucial factor for successful marathon preparation. Through a structured nutrition strategy, you can you your performance, prevent injuries, and accelerate your recovery. Plan your diet carefully, test different options in training, and ensure that your body is optimally supplied on race day. With the right preparation, nothing stands in the way of your marathon success nothing more in the way!
