Pro Nutrition: Your Guide to Optimal Sports Nutrition

As an athlete, you know that performance is not only built in training but is significantly influenced by nutrition. Especially in endurance sports, where the body experiences high stress over extended periods, a well-thought-out nutrition strategy is essential. In this guide, you will learn how "Pro Nutrition" can help you achieve your goals and promote your health.

What does Pro Nutrition mean in the context of endurance and energy?

Pro Nutrition stands for a professional, scientifically based approach to nutrition, specifically tailored to the needs of athletes. In endurance sports, this means optimally supplying the body with energy, accelerating recovery, and improving adaptability to training stimuli. It's about providing the right nutrients at the right time in the right amount to enable peak performance while maintaining health.

Your diet should always be individually tailored to your training, your goals, and your body. A marathon runner has different needs than a sprinter, and even within endurance sports, the requirements vary depending on the intensity and duration of the exertion. Pro Nutrition is therefore not a rigid concept but a dynamic approach that adapts to your specific requirements.

How it works / how the body can benefit from it

A Pro Nutrition-compliant diet can contribute to your performance and well-being in various ways:

• Optimal Energy Supply: Through targeted carbohydrate intake, your glycogen stores in muscles and liver are maximally filled, which provides you with a constant energy supply during training and competition and can prevent drops in performance (the so-called "bonk").
• Accelerated Recovery: An adequate intake of proteins and carbohydrates after training can support muscle repair and the replenishment of energy stores, helping you recover faster for your next session.
• Immune System Support: Intense training can stress the immune system. A nutrient-rich diet with sufficient vitamins and minerals can help strengthen your immune system and reduce susceptibility to infections.
• Improved Adaptability: The right nutrients support the physiological adaptations your body makes in response to training, such as increasing mitochondrial density or improving oxygen utilization.
• Prevention of Deficiencies: Athletes often have an increased need for certain micronutrients. A conscious diet can help prevent deficiencies that could impair your performance and health.

Fundamentals of Macro- and Micronutrient Supply for Athletes

The basis of optimal sports nutrition consists of macronutrients (carbohydrates, proteins, fats) and micronutrients (vitamins, minerals, trace elements). Their interaction is crucial for your performance.

Carbohydrates: The Primary Energy Provider

For endurance athletes, carbohydrates are the most important energy source because they can be quickly and efficiently converted into glucose and stored as glycogen in muscles and the liver. During intense exertion, your body preferentially draws on these stores.

Recommended Amounts: The required amount of carbohydrates varies greatly depending on training volume and intensity.

• Recreational and Casual Athletes: 3–5 g of carbohydrates per kilogram of body weight per day.
• Moderate to Intense Training Programs (1–2 hours per day): 5–7 g/kg body weight per day.
• Competitive Athletes or High-Intensity Training Sessions (2–3 hours per day): 6–10 g/kg body weight per day. For very long endurance efforts, it can even be up to 12 g/kg body weight per day.

Best Natural Sources: Prioritize complex carbohydrates that provide longer-lasting energy. These include whole grain products (oats, whole wheat bread, brown rice), legumes, potatoes, fruits, and vegetables.

Proteins: Building Blocks for Muscles and Regeneration

Proteins are essential for building and maintaining muscle mass, repairing muscle tissue after training, and forming important enzymes and hormones. Even if endurance athletes do not primarily aim for muscle growth, adequate protein intake is of great importance for regeneration.

Recommended Amounts: Endurance athletes have an increased protein requirement compared to non-athletes.

• Endurance Athletes: 1.4–1.6 g of protein per kilogram of body weight per day. Some studies even recommend up to 2.2 g/kg body weight, especially during periods of intense training or for weight control.

Best Natural Sources: High-quality protein sources include lean meat (poultry, beef), fish, eggs, dairy products (quark, yogurt), legumes (lentils, beans), tofu, and nuts.

Fats: Long-Term Energy and Essential Functions

Fats serve as an important long-term energy source, especially during longer, lower-intensity endurance efforts where fat metabolism is more heavily utilized. In addition, they are essential for the absorption of fat-soluble vitamins and the production of hormones.

Recommended Amounts: Fats should make up approximately 20–35% of your daily caloric intake. Pay attention to the quality of fats.

Best Natural Sources: Focus on unsaturated fatty acids from vegetable oils (olive oil, rapeseed oil, flaxseed oil), nuts, seeds, avocados, and fatty fish (salmon, mackerel) rich in omega-3 fatty acids.

Micronutrients: The Invisible Helpers

Although vitamins, minerals, and trace elements are only needed in small amounts, they are crucial for numerous bodily functions, energy metabolism, immune function, and muscle regeneration.

• B Vitamins: Play a central role in energy metabolism and are important for nerve function and blood formation. Vitamin B12, in particular, is indispensable for athletes.
• Vitamin D: Important for bone health, muscle function, and the immune system. A deficiency is common among athletes.
• Iron: Essential for oxygen transport in the blood and thus directly for endurance performance. Women and endurance athletes often have increased needs.
• Magnesium: Involved in muscle contraction, energy production, and the prevention of cramps.
• Zinc: Supports the immune system and protects against oxidative stress.
• Calcium: Important for bone health and muscle function.
• Electrolytes (Sodium, Potassium, Chloride): Crucial for fluid balance, nerve function, and muscle contraction, but lost through sweat.

Best Natural Sources: A varied diet rich in fruits, vegetables, whole grains, nuts, seeds, lean meat, and fish generally covers micronutrient needs.

Strategies to Boost Energy and Endurance Through Targeted Nutrition

To optimally support your energy and endurance, it's not just what you eat, but also when you eat that's crucial.

Before Training/Competition: Carb Loading

So-called carb loading aims to maximally replenish glycogen stores in your muscles and liver before prolonged endurance exertion. This can significantly improve your performance.

Application: In the 1–3 days before a competition, you should increase your carbohydrate intake to 8–12 g per kilogram of body weight per day, while simultaneously reducing your training volume. Prioritize easily digestible carbohydrates such as pasta, rice, potatoes, bread, and fruit.

Shortly Before Starting: About 3–4 hours before the competition, a carbohydrate-rich meal (e.g., oatmeal with fruit, bread with jam) is recommended to replenish liver glycogen stores.

During Training/Competition: Continuous Energy Supply

For endurance activities longer than 60 minutes, continuous carbohydrate intake is important to prevent performance drops.

Recommended Amounts:

• 60–120 minutes: 30–60 g of carbohydrates per hour.
• Longer than 120 minutes: 60–90 g of carbohydrates per hour. For extreme exertion (over 4 hours), up to 120 g/h may even be beneficial, but requires gastrointestinal training.

Products: Sports drinks, energy gels, bars, or easily digestible foods like bananas are suitable for this. Look for a combination of glucose and fructose to maximize absorption in the gut.

After Training/Competition: Initiate Recovery

The post-workout phase is crucial for recovery and replenishing glycogen stores. The first 30–60 minutes after exertion are considered the "anabolic window," during which the body is particularly receptive to nutrients.

Recommended Amounts: In the first four hours after exercise, consume 1–1.2 g of carbohydrates per kilogram of body weight per hour. A small amount of protein (approx. 20 g) can promote muscle repair and rebuilding.

Products: Recovery drinks, protein shakes with carbohydrates, yogurt with fruit and muesli, or a complete meal with rice, potatoes, and lean meat/fish are ideal here.

Hydration and Electrolytes: More than just quenching thirst

Adequate fluid intake is essential for performance and health. Through sweating, you not only lose water but also important electrolytes like sodium, potassium, magnesium, and chloride. A deficiency can lead to fatigue, cramps, and reduced performance.

Recommendation: Drink regularly throughout the day and especially before, during, and after training. For longer or more intense sessions, electrolyte drinks containing sodium, potassium, and magnesium in addition to water are beneficial. Monitoring your weight before and after training can help you determine your individual fluid loss and replenish it specifically (approx. 1.5 liters per kilogram of body weight lost).

Sample Plans for a Pro Nutrition-Compliant Diet

The following sample plans serve as a guide and must be individually adapted to your caloric needs, training, and preferences. A nutritionist can help you create a customized plan.

Sample Nutrition Plan for an Endurance Training Day (approx. 3000 kcal for 70 kg body weight)

This plan is designed for a day with moderate to intense endurance training.

• Breakfast (approx. 3 hours before training):
  • Large portion of oatmeal (80-100 g) with water or low-fat milk, berries (150 g), a banana, and a spoon of honey.
  • Additionally, 1 glass of orange juice and 500 ml of water.
• Morning snack (optional, approx. 1 hour before training):
  • A banana or an energy bar.
  • 250 ml of water.
• During training (approx. 60-90 minutes):
  • 500-750 ml sports drink with 30-60 g carbohydrates.
• Immediately after training (within 30-60 minutes):
  • Recovery shake (approx. 20-30 g protein, 40-60 g carbohydrates) or 250 g low-fat quark with fruit and a spoon of honey.
  • 500 ml of water.
• Lunch (approx. 1-2 hours after training):
  • Large portion of whole grain rice (150-200 g cooked) or potatoes (250-300 g) with lean fish (150 g salmon or cod) or chicken breast (150 g).
  • Large mixed salad with olive oil dressing.
  • 500 ml of water.
• Afternoon snack:
  • Greek yogurt (150 g) with nuts (30 g) and some fruit.
  • 250 ml of water.
• Dinner:
  • Whole grain pasta (150-200 g cooked) with tomato sauce and lean minced meat (100 g) or lentils.
  • Large portion of steamed vegetables.
  • 500 ml of water.
• Late evening snack (optional, before bedtime):
  • Small portion of cottage cheese with berries or a small glass of milk.

Common Mistakes and How to Avoid Them

Even with the best intentions, errors often creep into sports nutrition that can impair your performance.

• Too few carbohydrates: This is one of the most common mistakes among endurance athletes. Depleted glycogen stores lead to faster fatigue and performance drops. Ensure adequate carbohydrate intake, especially before and during longer periods of exertion.
• Incorrect meal timing: A large, high-fat or high-fiber meal shortly before training can lead to digestive problems. Plan your meals so that your body has enough time to digest (2-3 hours before training for larger meals).
• Insufficient fluid intake: Dehydration hinders performance. Drink enough and remember to take electrolytes during longer sessions.
• Neglecting recovery: The post-workout meal is crucial. If you skip it or don't make it adequate, you delay recovery and the replenishment of energy stores.
• Too much fat and fiber before training: Fat-rich and fiber-rich foods stay in the stomach longer and can lead to gastrointestinal discomfort during training.
• Relying solely on supplements: Supplements can be a useful addition, but they never replace a balanced and wholesome diet. A nutrient-rich diet always forms the foundation.
• Demonizing sugar as an "enemy": While excessive sugar consumption should be avoided in everyday life, easily digestible carbohydrates (sugar) can be useful as a quick energy source during and immediately after intense exercise.

When are supplements useful?

Supplements can be a useful addition to a balanced diet in certain situations to close specific nutrient gaps or optimize performance. However, they are not a substitute for a wholesome diet.

Carbohydrates (e.g., maltodextrin, dextrose)

Useful for: Longer endurance exercise (> 60 minutes) during training or competition to maintain energy supply and prevent performance drops. Also for rapid replenishment of glycogen stores after intense sessions.

Recommended amounts: During training, 30–90g per hour, depending on intensity and duration. After training, 1–1.2g/kg body weight in the first few hours.

Protein powder (e.g., whey, casein)

Useful for: Increased protein requirements that cannot be met solely through normal diet, or for convenient and quick protein intake after training to support muscle regeneration.

Recommended amounts: Approx. 20–30g of protein immediately after training. Total intake should be in the range of 1.4–2.2g/kg body weight per day.

Electrolyte drinks or powders

Useful for: Longer or intense training sessions, especially in high temperatures, to compensate for electrolyte loss through sweating and prevent dehydration and performance drops.

Recommended amounts: The exact composition varies, but look for sodium, potassium, and magnesium. For longer sessions, 500-700mg of sodium per hour may be recommended.

Creatine

Useful for: Creatine is primarily known for its performance-enhancing effects in strength sports, but it can also benefit endurance athletes, especially during high-intensity intervals, sprints, or final bursts. It can support rapid ATP provision and improve recovery.

Recommended amounts: A common dosage is a loading phase of 5g (or 0.3g/kg body weight) per day for 5–7 days, followed by a maintenance dose of 3–5g per day. A loading phase is not strictly necessary but extends the time until stores are full.

Beta-Alanine

Useful for: Beta-alanine can increase carnosine levels in muscles, which acts as an acid buffer and can delay neuromuscular fatigue. This is particularly beneficial for high-intensity efforts between 1 and 4 minutes, but can also improve general muscle endurance.

Recommended amounts: A loading phase of 3.2–6.4g per day, divided into several doses, over 2–4 weeks is common, followed by a maintenance dose of 3.2g daily.

Nitrate (from beetroot)

Useful for: Nitrate can increase the bioavailability of nitric oxide (NO), which acts as a vasodilator, can lower blood pressure, and promote oxygen and nutrient supply to muscles. This can support endurance performance.

Recommended amounts: Often in the form of beetroot juice concentrates. The exact dosage should be taken from the product information.

Possible Risks / Overdosing / Interactions

Although dietary supplements are generally safe, improper use can lead to risks:

• Overdosing: Excessive intake of certain vitamins and minerals can be harmful. Always stick to the recommended dosages.
• Gastrointestinal Issues: Some supplements, especially at high dosages or with insufficient fluid intake, can cause gastrointestinal problems. Always test new products during training, not in competition.
• Interactions: Certain supplements can interact with medications or other dietary supplements. When in doubt, always speak to your doctor or a nutritionist.
• Contaminants: When purchasing dietary supplements, look for recognized seals of approval (e.g., Kölner Liste) to minimize the risk of contamination or prohibited substances.
• Creatine: Can lead to a slight weight gain due to water retention in the muscles (approx. 1-2 kg), which is harmless and not fat.
• Beta-Alanine: Can cause a harmless, tingling sensation on the skin (paresthesia) that subsides after a short time.

Nutrient/Supplement	Main Function in Endurance Sports	Natural Sources	When is Supplementation Useful?
Carbohydrates	Primary energy source, replenishing glycogen stores	Whole grains, rice, potatoes, fruit, legumes	During prolonged exertion (> 60 min), rapid recovery after intense sessions
Proteins	Muscle maintenance, repair, and regeneration	Lean meat, fish, eggs, dairy products, legumes, tofu	With increased demand, rapid intake after training
Fats	Long-term energy, hormone production, vitamin absorption	Nuts, seeds, avocados, vegetable oils, fatty fish	Usually sufficient through diet
Electrolytes (Na, K, Mg)	Fluid balance, nerve and muscle function	Bananas, avocados, nuts, salty snacks, mineral water	With heavy sweating, longer/intense sessions
Creatine	Rapid energy supply, improvement of sprints/final bursts, regeneration	Meat, fish (small amounts)	For performance enhancement during high-intensity phases and to support regeneration
Beta-Alanine	Buffers lactic acid, delays muscle fatigue	Meat, poultry, fish (small amounts)	To improve performance in efforts lasting 1-4 minutes and general muscular endurance
B vitamins	Energy metabolism, nerve function, blood formation	Whole grains, meat, dairy products, legumes	In case of proven deficiency or increased need
Iron	Oxygen transport in the blood	Red meat, legumes, green leafy vegetables	In case of proven deficiency (especially in women and endurance athletes)

Frequently Asked Questions

What is the most important nutrient for endurance athletes?

Carbohydrates are the most important energy source for endurance athletes, as they are the primary fuel during intense exercise and replenish glycogen stores.

How much water should I drink daily as an athlete?

The required fluid intake varies depending on activity, ambient temperature, and individual predisposition. As a rule of thumb, you should drink at least 2-3 liters per day, plus an additional 0.5-1 liter per hour during physical activity. Make sure to compensate for fluid loss through sweating. Monitoring your weight before and after training can help you determine your individual fluid loss.

Can I really improve my endurance through nutrition?

Yes, targeted and adapted nutrition can significantly improve your endurance performance. By optimizing energy supply, regeneration, and the provision of important micronutrients, you can unlock your full potential.

Are low-carb diets suitable for endurance athletes?

Low-carb diets can train fat metabolism, but the data regarding a superior improvement in endurance performance compared to high-carb diets is not conclusive. For maximum performance during intense endurance exercise, carbohydrates are essential. A low-carb diet may be useful in training under certain circumstances, but should be done with caution and under professional guidance.

How long before a competition should I adjust my diet?

Targeted dietary adjustments, especially carboloading, typically begin 1–3 days before the competition. However, it is advisable to test different nutritional strategies during training to ensure individual tolerance.

What role do micronutrients like vitamins and minerals play?

Micronutrients are crucial for numerous metabolic processes, energy production, immune function, and muscle regeneration. Athletes often have increased needs, and a deficiency can impair performance and health. A balanced intake is therefore essential.

Implementing a Pro Nutrition-compliant diet requires commitment and knowledge. Take the time to understand your body and its needs. In case of uncertainties or specific health concerns, we always recommend consulting a doctor or a qualified nutritionist. Remember: dietary supplements are not a substitute for a balanced diet, but a possible complement. The basis for your athletic success always lies in intelligent and wholesome nutrition.