Comparing thirst and spot urine concentrations in humans of differing body sizes: An observational study.

J D Adams, Ashton E Barlow, Donya Z Farzam, Cory L Butts, Anthony Ludwig, Stavros A Kavouras

Journal: Physiology & behavior 2022;245():113673

PMID: 34921838

Full Text on Elsevier Science View on PubMed

Abstract

Elevated body mass index (BMI) has been associated with elevated urine osmolality (UOsm), despite having higher total water intake, but it is unclear if overweight/obese individuals have reduced thirst. In this observational study, we found that overweight/obese individuals had higher UOsm compared to normal-weight individuals (749 ± 37 vs. 624 ± 35 mmol•kg; P < 0.01) while possessing similar thirst ratings (56.4 ± 3 vs. 51.6 ± 3 mm; P = 0.3). In this observational study, overweight/obese individuals possessed more concentrated urine in the absence of higher thirst perception.

Address: Department of Health and Human Performance, College of Charleston, Charleston, SC, United States of America. Electronic address: [email protected].; Department of Health and Human Performance, College of Charleston, Charleston, SC, United States of America.; Department of Exercise and Nutrition Sciences, Weber State University, Ogden, UT, United States of America.; College of Health Solutions, Arizona State University, Phoenix,AZ ,United States of America.

DOI: 10.1016/j.physbeh.2021.113673

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MeSH Terms: Drinking, Humans, Obesity, Osmolar Concentration, Overweight, Thirst