Endurance running places unique nutritional demands on runners. For the best nutrition strategies, it is worth noting that every runner is different, so it is essential for each individual to discover which foods best support their training and racing. However, there are key areas of nutrition that all endurance runners should focus on:
- Daily Nutrition for Endurance Runners
- Nutrition Specific for Endurance Training
- Pre-, During-, and Post-Performance Nutrition
- Hydration Strategies for Endurance Runners
- Weight Management for Runners
With experience, a runner should know how to find and vet the right nutrition information for them.
Table of Contents
Protein and fats
Protein and healthy fats are crucial macronutrients for endurance runners. Runners should aim for slightly higher intake standards than the general public to support long-distance training, muscle recovery, and sustained energy. Focusing on lean proteins, such as chicken, fish, eggs, and plant-based sources, along with healthy fats like avocados, nuts, seeds, and olive oil, helps optimize endurance performance and overall health.
Nutrition strategies adapt to a training cycle
If training volume and intensity increase over the course of a year or cycle, runners must adjust their energy intake to match these demands. As endurance training intensifies, increasing carbohydrate intake and consumption of recovery-supportive foods become critical. During tapering, the goal shifts to preventing unwanted weight gain due to reduced training volume while still prioritizing foods that support peak performance on race day. For runners tackling events longer than 90 minutes, glycogen supercompensation (commonly known as ‘carbo loading’) in the 36–48 hours before the race can enhance endurance performance by 2–3%.
Testing a variety of fueling strategies during training is essential for endurance runners. This practice helps identify which nutrition approaches minimize gastrointestinal (GI) distress, a common issue that can impair both training sessions and race-day performance.
There is no universal nutrition plan for endurance runners. Each runner should experiment with new nutritional strategies during the off-season and early preparation phases. This allows time to monitor for any adverse effects and to fine-tune a fueling plan that supports optimal running performance.
Hydration
Endurance runners can monitor hydration status by observing urine color (pale yellow is ideal), tracking body weight changes before and after workouts, and paying attention to thirst cues. Proper hydration is critical for maintaining performance, especially during long-distance runs or races in hot and humid conditions.
Weight management
Runners should aim to reach their peak running weight at the right time in their training cycle. Maintaining very low body fat throughout the year can be detrimental to health and performance. For context, elite female runners typically have 8% to 12% body fat, while elite male runners are often at 4% to 6% during peak competition season. Individual targets may vary, and overall well-being should always take priority over appearance or arbitrary numbers.
When it comes to weight management during training, it is generally safer to err on the side of being slightly undertrained than to risk overtraining or excessive weight loss, both of which can compromise endurance, recovery, and overall health.
Whole food versus supplementing
Runners should strive to obtain their nutrition from a diverse selection of whole foods, emphasizing fruits, vegetables, whole grains, lean proteins, and healthy fats. To ensure optimal nutrient levels—especially in the context of intense endurance training—supplementing with multivitamins, vitamin D, and iron can be beneficial but should be tailored to individual needs and ideally done under the guidance of a healthcare professional.
In summary, optimal nutrition is fundamental to success in endurance running. By personalizing nutrition strategies, focusing on balanced whole foods, staying hydrated, and carefully managing weight, runners can fuel their bodies for both peak performance and long-term health.