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A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index

Maughan, RJ, Watson, P, Cordery, PA, Walsh, NP, Oliver, SJ, Dolci, A, Rodriguez-Sanchez, N and Galloway, SD (2015) A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index. American Journal of Clinical Nutrition, 103 (3). pp. 717-723. ISSN 1938-3207

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Abstract

BACKGROUND: The identification of beverages that promote longer-term fluid retention and maintenance of fluid balance is of real clinical and practical benefit in situations in which free access to fluids is limited or when frequent breaks for urination are not desirable. The postingestion diuretic response is likely to be influenced by several beverage characteristics, including the volume ingested, energy density, electrolyte content, and the presence of diuretic agents. OBJECTIVE: This study investigated the effects of 13 different commonly consumed drinks on urine output and fluid balance when ingested in a euhydrated state, with a view to establishing a beverage hydration index (BHI), i.e., the volume of urine produced after drinking expressed relative to a standard treatment (still water) for each beverage. DESIGN: Each subject (n = 72, euhydrated and fasted male subjects) ingested 1 L still water or 1 of 3 other commercially available beverages over a period of 30 min. Urine output was then collected for the subsequent 4 h. The BHI was corrected for the water content of drinks and was calculated as the amount of water retained at 2 h after ingestion relative to that observed after the ingestion of still water. RESULTS: Total urine masses (mean +/- SD) over 4 h were smaller than the still-water control (1337 +/- 330 g) after an oral rehydration solution (ORS) (1038 +/- 333 g, P < 0.001), full-fat milk (1052 +/- 267 g, P < 0.001), and skimmed milk (1049 +/- 334 g, P < 0.001). Cumulative urine output at 4 h after ingestion of cola, diet cola, hot tea, iced tea, coffee, lager, orange juice, sparkling water, and a sports drink were not different from the response to water ingestion. The mean BHI at 2 h was 1.54 +/- 0.74 for the ORS, 1.50 +/- 0.58 for full-fat milk, and 1.58 +/- 0.60 for skimmed milk. CONCLUSIONS: BHI may be a useful measure to identify the short-term hydration potential of different beverages when ingested in a euhydrated state. This trial was registered at www.isrctn.com as ISRCTN13014105.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced version of an article accepted for publication in American Journal of Clinical Nutrition following peer review. The version of recordRonald J Maughan, Phillip Watson, Philip AA Cordery, Neil P Walsh, Samuel J Oliver, Alberto Dolci, Nidia Rodriguez-Sanchez, Stuart DR Galloway, A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index, The American Journal of Clinical Nutrition, Volume 103, Issue 3, March 2016, Pages 717–723, is available online at: https://doi.org/10.3945/ajcn.115.114769
Uncontrolled Keywords: 11 Medical and Health Sciences, 09 Engineering
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sports & Exercise Sciences
Publisher: Oxford University Press (OUP)
Related URLs:
Date Deposited: 12 Mar 2020 11:27
Last Modified: 12 Mar 2020 11:30
DOI or Identification number: 10.3945/ajcn.115.114769
URI: http://researchonline.ljmu.ac.uk/id/eprint/12468

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