Hydration strategies during tapering are essential to ensure athletes reach the start line in an optimal physiological state. More than simply “drinking water,” this phase requires precise adjustments in fluid and electrolyte intake to optimize fluid balance, plasma volume, and thermoregulation.
What changes in hydration during tapering
The tapering period is characterized by a reduction in training volume while maintaining intensity. In this context, fluid expenditure decreases, but the need for precise hydration control increases.
Common mistakes include:
- Underestimating fluid intake due to reduced training load
- Consuming only water while neglecting electrolytes
- Starting the race in a mildly dehydrated or overhydrated state
The goal is not only to avoid dehydration, but to achieve an optimized state of euhydration.
The role of sodium in fluid retention
Sodium plays a key role in hydration strategies during tapering, as it directly influences fluid retention and plasma volume.
Without adequate sodium:
- Ingested fluids may be rapidly excreted
- Thirst stimulus may be reduced
- The risk of imbalance increases
When properly managed, sodium helps retain fluids in the body, promoting more efficient hydration.
Practical strategies in the days leading up to the race
In the 2 to 3 days before the race, hydration should be structured progressively.
Key practical points:
- Maintain regular fluid intake throughout the day, avoiding large single boluses
- Include sodium sources alongside fluids
- Monitor urine color as a simple indicator of hydration status
- Adjust intake based on climate, sweat rate, and individual needs
This is a period of consistency, not excess.
Strategic hyperhydration: when it makes sense
In certain contexts, especially during long events or in hot environments, mild hyperhydration strategies may be beneficial.
This involves:
- Increasing fluid intake with sodium in a controlled manner
- Initiating the strategy hours before the start
- Avoiding excessive intake that may lead to gastrointestinal discomfort
When properly applied, this approach may delay dehydration during exercise and improve heat tolerance.
What to do on race day
On race day, the goal is to arrive at the start line balanced, not to correct previous mistakes.
Practical recommendations:
- Consume fluids with sodium in the hours leading up to the start
- Avoid excessive intake of plain water
- Use a fractionated intake approach until about 60 minutes before the start
- Adjust final intake based on thirst and gastrointestinal comfort
The idea is to align physiology with comfort.
Practical application for the athlete
To turn strategy into practice:
- Plan hydration in advance, do not leave it for race day
- Test strategies in training, especially during higher intensity sessions
- Consider individual factors such as sweat rate and tolerance
- Use electrolyte solutions to optimize fluid retention
Small adjustments can have a meaningful impact on performance.
Hydration strategies during tapering go far beyond simply drinking water. Managing fluids and electrolytes, especially sodium, is essential to ensure fluid balance, comfort, and performance on race day.
Arriving at the start line in an optimal state is the result of planning, consistency, and strategy.
Reference
McCubbin AJ, Irwin C. The effect of pre exercise oral hyperhydration on endurance exercise performance, heart rate, and thermoregulation, a meta analytical review. Applied Physiology, Nutrition, and Metabolism, 2024. Disponível em: https://pubmed.ncbi.nlm.nih.gov/38198662/
