The marathon taper phase is one of the most important moments in race preparation. Even after months of well executed training, mistakes in nutrition during this final stage can compromise energy levels, muscle recovery, and performance on race day. Adjusting carbohydrate intake, hydration, and electrolytes during the taper is essential to arrive at the starting line with full energy stores and the body ready to perform.
What is the marathon taper?
The taper, also known as the polishing phase, is the final period before the race when training volume decreases to reduce fatigue and optimize recovery. This phase usually lasts between 7 and 21 days, depending on the athlete’s strategy and training plan.
During this period, overall energy expenditure tends to decrease because of the lower training volume. However, this does not mean drastically cutting food intake. The main goal is to balance recovery, muscle maintenance, and glycogen storage.
Why is nutrition during the taper so important?
Nutrition during the taper directly impacts:
- muscle glycogen storage
- hydration
- electrolyte balance
- muscle recovery
- gastrointestinal comfort
- energy levels on race day
Many athletes make the mistake of reducing carbohydrates too much because they are training less. This can lower energy stores and increase feelings of fatigue within the first kilometers of the marathon.
On the other hand, overeating heavy, greasy, or high fiber foods can also cause gastrointestinal discomfort and negatively affect preparation.
Adjust carbohydrates, do not eliminate them
During the taper, carbohydrates remain the most important nutrient for marathon runners. As training volume decreases, the body becomes more efficient at storing muscle glycogen, especially when carbohydrate intake is adequate.
In many protocols, the final 2 to 3 days before the race include a carbohydrate loading strategy.
This range is commonly used in glycogen supercompensation strategies for endurance events lasting longer than 90 minutes.
Good options include:
- rice
- pasta
- bread
- fruit
- honey
- tapioca
- sports drinks
- carbohydrate gels
The ideal approach is to prioritize foods that the athlete has already tested in training.
Pay attention to hydration and sodium
Reducing training volume does not mean neglecting hydration. During the taper, maintaining proper fluid balance supports recovery and also helps optimize glycogen storage, since glycogen and water are stored together inside the muscle.
Sodium also becomes especially important during this phase, particularly for athletes with high sweat rates or races held in hot conditions. Hyperhydration strategies with sodium are increasingly being used in endurance sports to optimize fluid retention and reduce the risk of dehydration during competition.
Some athletes use specific sodium intake protocols within the 24 hours before the marathon, always in an individualized and previously tested manner.
Reduce the risk of gastrointestinal discomfort
In the final days before the marathon, it is recommended to reduce excessive intake of:
- fried foods
- alcohol
- very fatty foods
- excess fiber
- heavily seasoned foods
- unfamiliar foods
The goal is to arrive at the race with a stable gastrointestinal system. Many marathon problems begin with last minute dietary changes.
The pre race dinner should be strategic
There is a common tendency to turn the pre race dinner into an excessive eating event. However, eating more does not necessarily mean storing more energy.
The most important factor is having a meal rich in carbohydrates, moderate in protein, and low in fat and fiber.
Common examples include:
- pasta with a simple sauce
- rice with lean protein
- bread with honey or jam
- potatoes or mashed potatoes
Simple meals usually work better than extremely heavy ones.
The race nutrition strategy also begins during the taper
The taper is an excellent moment to review the entire marathon nutrition strategy:
- carbohydrate intake per hour
- sodium intake
- caffeine use
- hydration
- gel timing
Arriving at the starting line without a nutrition plan significantly increases the risk of performance decline in the final kilometers.
Conclusion
Nutrition during the marathon taper has a direct impact on performance. The goal is not to eat less because training volume decreased, but rather to adjust the strategy to maximize recovery, hydration, and energy storage.
Carbohydrates, sodium, and hydration are key pillars during this phase. In addition, maintaining familiar foods and avoiding excesses helps reduce gastrointestinal discomfort and improves race day preparation.
In endurance sports, the difference between maintaining pace or breaking down in the final kilometers often begins with how the athlete fuels during the last week before the race.
