Thirst-Guided hydration may keep Ultra-Runners safer
NCT ID NCT02519764
First seen Nov 19, 2025 · Last updated May 15, 2026 · Updated 18 times
Summary
This study followed 198 runners in the 2015 Ultra-Trail du Mont-Blanc to see if drinking only when thirsty ("at thirst") helps maintain normal blood sodium levels compared to other hydration methods. The goal was to understand how different drinking strategies affect sodium balance during extreme endurance events. Results may help runners avoid dangerous sodium imbalances.
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This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Locations
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CHRU de Nîmes - Hôpital Universitaire Carémeau
Nîmes, 30029, France
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CHU de Nice - Hôpital St-Roch
Nice, 06001, France
Conditions
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