Does Glycerol Exercise Hydration Randomized Trial work?

The current Migaku evidence database contains 2 reusable source documents for Glycerol Exercise Hydration Randomized Trial. This answer focuses on strength of evidence and what the studies can or cannot prove. - Background Endurance athletes experience significant water loss during exercise, which can impair performance and increase the risk of dehydration. [Herrera-Amante CA (2025); evidence level 2] - Results Glycerol supplementation significantly improved running economy, reducing CCU ( p = 0.025, d = 0.43), OCU ( p = 0.011, r = 0.46), HR ( p = 0.029, d = 0.42), and RPE ( p = 0.003, d = 0.60). [Herrera-Amante CA (2025); evidence level 2] - Although BT showed a slight decrease ( p = 0.053, d = 0.37), it did not reach statistical significance, suggesting a trend toward improved thermoregulation. [Herrera-Amante CA (2025); evidence level 2] - Glycerol hyperhydration has been explored as a strategy to enhance pre-exercise hydration, particularly when fluid intake opportunities are limited. [Herrera-Amante CA (2025); evidence level 2] - Compared to G and CON, blood pH and blood bicarbonate concentration was significantly higher with G + SB and SB from 60-180 min (p Conclusions Fluid retention improved in G, SB and G + SB compared to CON, although there were no additive effects with G + SB compared to SB or G. [Patrick B (2026); evidence level 4] Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording. This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.