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The Addition of Glycerol and Sodium Chloride to a Hyperhydration Protocol Does Not Improve Half-Marathon Time-Trial Performance in Trained Runners in Warm Conditions.

Updated Oct 16, 2026

Human researchInternational journal of sports physiology and performance2025Read the source on PubMed

From the authors’ conclusion

“Glycerol- and sodium-induced hyperhydration improved hydration status without changing gastrointestinal symptoms prior to endurance exercise in warm conditions but did not improve half-marathon performance.”

A short excerpt, not the complete finding. Read the linked abstract for the comparison, measurements and context.

Publication details
Record
PubMed 40139199
Publication types
Randomized Controlled Trial
Indexed subjects
Sodium Chloride · Glycerol · Body Temperature · Cross-Over Studies · Plasma Volume
Source record checked
2026-10-16

Publication type and subject indexing describe the record; they are not a quality grade or proof of a benefit. An abstract does not replace a review of the full methods and results.

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Sources