Self-Reported Changes in Thirst and Alertness during Variable Prescribed Fluid Intake

PURPOSE: To evaluate the relationship between self-reported thirst and alertness in people drinking variable amounts of prescribed water. METHODS: Subjects (n = 115, 59 males, 32 ± 10 y; 24.6 ± 4.4 kg·m-2) visited the lab 3 times over 10 days: V1, a baseline visit that prior to participants were drinking ad libitum; V2, following 3 days of fluid restriction (1 L·d-1, of which 250 mL was consumed in the morning prior to the visit); and V3, the...