Urinary markers of hydration during 3-day water restriction and graded rehydration

This investigation had three purposes: (a) to evaluate changes in hydration biomarkers in response to a graded rehydration intervention (GRHI) following 3 days of water restriction (WR), (b) assess within-day variation in urine concentrations, and (c) quantify the volume of fluid needed to return to euhydration as demonstrated by change in Ucol. 115 adult males and females were observed during 1 week of habitual fluid intake, 3 days of fluid...