Participants were randomized to rehydrate with an electrolyzed, high-pH (alkaline) water or standard water of equal volume (2% body weight) and assessed for an additional 2-h recovery period following exercise in order to assess any potential variations in measured parameters. All individuals exercised in a warm environment (30 ☌, 70% relative humidity) until their weight was reduced by a normally accepted level of 2.0 ± 0.2% due to perspiration, reflecting the effects of exercise in producing mild dehydration. One hundred healthy adults (50 M/50 F, 31 ± 6 years of age) were enrolled at a single clinical research center in Camden, NJ and completed this study with no adverse events. This randomized, double-blind, parallel-arm trial assessed the effect of high-pH water on four biomarkers after exercise-induced dehydration. Additional parameters are needed to fully appreciate and better understand rehydration following strenuous exercise. Currently, changes in body mass are used as a parameter during post-exercise hydration. No specific hydration marker is universally accepted as an ideal rehydration parameter following strenuous exercise. Previous research has shown fluid replacement beverages ingested after exercise can affect hydration biomarkers.
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