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- W4214611501 abstract "Maintaining euhydration is beneficial for health, safety, and physical performance [<xref ref-type=bibr rid=ref1>1</xref>]; however, it may also improve subjective feelings [<xref ref-type=bibr rid=ref2>2</xref>, <xref ref-type=bibr rid=ref3>3</xref>].The aim of this study was to evaluate the relationship between changes in self-reported thirst and alertness in people undergoing changes in drinking water volume.Subjects (mean ± SD) (n = 115, 59 males, 32 ± 10 years; 24.6 ± 4.4 kg·m-2) visited the lab 3 times over 10 days: V1, a baseline visit prior to participants were drinking ad libitum; V2, following 3 days of fluid restriction (1 L·d-1, 250 mL was consumed in the morning prior to the visit); and V3, the morning following a prescribed increase in water intake. The increase in water intake at V3 varied by group assignment: control group (CON) maintained 250 mL, while LOW and HIGH groups (n = 45 each) consumed 496 ± 82 mL and 878 ± 125 mL, respectively. At each visit, subjects indicated on an open-ended visual analog scale (VAS) how thirsty and alert they felt and were measured in millimeters (mm). Four, two-way ANOVAs (group × visit) for change in thirst and alertness between V1-V2 and V2-V3 were completed. A repeated-measures correlation (rrm) procedure was completed for change in alertness and thirst from V1 to V2 and V2 to V3 [<xref ref-type=bibr rid=ref4>4</xref>]. The study was approved by the University of Wyoming's Institutional Review Board (protocol #20160524EJ01208), and all subjects provided written informed consent.Groups were similar at baseline (V1) for fluid intake, thirst, and alertness (all p ≥ 0.17). Fluid restriction (V2) resulted in a main effect of visit for thirst and alertness (both p < 0.01), with no main effect of group. Thirst increased (35 ± 35 mm) and alertness decreased (-19 ± 31 mm) from V1 to V2. The prescribed increase in water intake (V3) revealed a significant interaction of visit and group for thirst and alertness (both p < 0.01) (Table <xref ref-type=table rid=t01>1</xref>). Independent-samples t tests with a Bonferroni correction revealed that HIGH reduced thirst (-38 ± 37 mm) and increased alertness (18 ± 25 mm), while no change was observed for LOW (thirst, -7 ± 37 mm; alertness -1 ± 24 mm) and CON (thirst, -6 ± 23 mm; alertness 0 ± 23 mm; all p < 0.01) (Fig. <xref ref-type=fig rid=f01>1</xref>). There was no difference between LOW and CON (both p > 0.92). Repeated-measures correlation analysis revealed an inverse relationship between change in alertness and thirst (rrm [114] = -0.53, 95% CI [-0.65, -0.38], p < 0.01).A reduction in water intake resulted in an increase in thirst and decrease in alertness. Following 3 days of fluid restriction, 750-1,000 mL of water intake was needed to decrease thirst and increase alertness. Overall, an inverse relationship was observed between self-reported thirst and alertness." @default.
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- W4214611501 date "2021-01-01" @default.
- W4214611501 modified "2023-10-15" @default.
- W4214611501 title "Self-Reported Changes in Thirst and Alertness during Variable Prescribed Fluid Intake" @default.
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- W4214611501 doi "https://doi.org/10.1159/000521066" @default.
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