Balancing training reduction and carbohydrate increase during tapering is one of the most important strategies for endurance athletes aiming for peak performance. This period, known as taper, is designed to reduce accumulated fatigue while maximizing muscle glycogen stores.
A well-structured carbohydrate strategy during tapering can be a key determinant of race-day performance. However, mistakes in adjusting training and nutrition are still common.
What happens in the body during endurance tapering?
During endurance tapering, there is a planned reduction in training volume, typically between 40% and 60%, while maintaining some level of intensity. This adjustment promotes muscle recovery, reduces accumulated muscle damage, and improves neuromuscular function.
From a metabolic perspective, there is an increase in insulin sensitivity and greater efficiency in glycogen storage. This environment favors glycogen supercompensation, especially when combined with an appropriate carbohydrate intake strategy.
How much should training be reduced during tapering without losing performance?
Training reduction during tapering should prioritize volume without completely eliminating intensity.
In practice, it is recommended to reduce training volume by 40% to 60%, maintain training frequency, and include short sessions with controlled intensity. This approach preserves key physiological adaptations, such as VO₂max and movement economy, while reducing fatigue.
How to adjust carbohydrate strategy during tapering?
Even with reduced training, increasing carbohydrate intake during tapering is essential to optimize glycogen stores.
The most consistent recommendation in the literature is to consume between 8 to 12 g of carbohydrate per kg of body weight per day in the 2 to 3 days leading up to the event.
This increase should be progressive and strategic. In the early days of tapering, intake can remain moderate, following the reduction in training volume. In the final phase, intake should increase more aggressively to promote supercompensation.
Why does increasing carbohydrate intake work even with less training?
One of the key aspects of nutritional tapering is understanding that reduced training creates an optimal environment for energy storage.
With lower glycogen depletion, reduced muscle damage, and increased insulin sensitivity, muscles are able to store more glycogen per unit of carbohydrate consumed.
This effect allows the athlete to start the event with elevated energy stores, even with reduced training in the preceding days.
Common mistakes in tapering strategy
Some mistakes can directly compromise tapering strategy in endurance.
Excessively reducing caloric intake alongside training reduction is one of the main issues. Another common mistake is increasing carbohydrate intake too early, which may cause gastrointestinal discomfort without additional benefits.
Additionally, testing new foods, neglecting sodium intake, and failing to adjust hydration can negatively impact performance.
Practical application for endurance athletes
In practice, an effective strategy involves progressively reducing training volume throughout the week while maintaining light intensity stimuli.
In the early days, carbohydrate intake can be around 5 to 7 g/kg/day. In the final 2 to 3 days, intake should increase to 8 to 12 g/kg/day, prioritizing easily digestible and previously tested foods.
It is also essential to maintain adequate sodium intake and a proper hydration strategy, especially for long-duration events or those performed in hot environments.
Conclusion
The best way to balance training reduction and carbohydrate increase during tapering involves a strategic alignment between physical stimulus and energy availability.
Reducing training volume in a controlled manner, maintaining intensity, and increasing carbohydrate intake in the final days are key factors to maximize glycogen supercompensation.
When properly executed, tapering allows the athlete to align recovery, energy storage, and performance on race day.
