HYDRATION STATUS WHEN INCREASING DAILY FLUID INTAKE WITH VARIOUS BEVERAGES

Authors

MA Tucker
MS Ganio
JD Adams
LA Brown
C Ridings
J Burchfield
B Robinson
J McDermott
NE Moyen
B Schreiber
T Washington
A Bermudez
M Bennett
M Buyckx

Abstract

Matthew A. Tucker¹, Matthew S. Ganio¹, John D. Adams¹, Lemuel A. Brown¹, Christian Ridings¹, Jenna Burchfield¹, Blake Robinson¹, Jamie McDermott², Nicole E. Moyen¹, Brett Schreiber¹, Tyrone Washington¹, Andrea Bermudez¹, Meredith Bennett¹, and Maxime Buyckx³; ¹University of Arkansas, Fayetteville, Arkansas; ²McDermott Nutrition, Fayetteville, Arkansas; ³The Coca-Cola Company, Atlanta, Georgia.

Few studies have examined how drinking fluids of varying composition may affect hydration status in healthy, free-living adults. Further, relatively little is known about how hydration status is affected when increasing fluid ingestion with various beverages. PURPOSE: To investigate the hydration status of healthy, free-living adult males when given varying volumes of different beverage types. METHODS: Thirty-six healthy males (age 24±5 y; height 177.7±8.2 cm; mass 75.1±11.4 kg) volunteered for this study. Subjects were randomly divided into four treatment groups for two weeks of testing: water only, water+cola, water+diet cola, or water+cola+diet cola+orange juice. Volumes of fluid were split evenly between beverages within each treatment. Each week consisted of 24-h of testing in which food was provided. Total fluid consumed (including moisture content of food) was equivalent between treatment groups. Week 1 total fluid ingestion over the 24-h period was 35 ml/kg body mass; week 2 total fluid ingestion was 40 ml/kg body mass. At the beginning of each 24-h testing period, equivalent hydration status was confirmed via serum osmolality (Osm_serum; 292±5 vs. 291±5 mOsm, for weeks 1 and 2, respectively; p >.05). Urine was collected over the 24-h period and analyzed for osmolality (Osm_urine) and volume (Vol_urine). Osm_serum and total body water (TBW) via bioelectrical impedance was collected and analyzed after 24-h of beverage intervention. RESULTS: Per the protocol, total beverage consumption, independent of treatment increased from week 1 (1721±384 ml) to week 2 (2096±437 ml) by 22±2 % (375±57 ml). There was no effect of beverages on hydration differences between weeks (i.e., no interaction; p >.05). Independent of week, there were no hydration differences between beverage groups (p >.05). The increase in fluid consumption between week 1 and week 2 did not change TBW (43.7±5.5 vs. 43.5±5.2 kg), Osm_serum (292± 4 vs. 293±5 mOsm), Osm_urine (599±221 vs. 561±217 mOsm) or Vol_urine (1526±624 vs. 1621±651 ml) (all p >.05). CONCLUSION: Regardless of fluid volume consumed, there were no differences between the beverages in providing adequate hydration over a 24-h period in free-living adult males. This suggests that the fluid contained in various beverages is equally effective in hydrating the body.

Funded by The Coca-Cola Company.

Recommended Citation

Tucker, MA; Ganio, MS; Adams, JD; Brown, LA; Ridings, C; Burchfield, J; Robinson, B; McDermott, J; Moyen, NE; Schreiber, B; Washington, T; Bermudez, A; Bennett, M; and Buyckx, M (2013) "HYDRATION STATUS WHEN INCREASING DAILY FLUID INTAKE WITH VARIOUS BEVERAGES," International Journal of Exercise Science: Conference Proceedings: Vol. 11: Iss. 1, Article 60.
Available at: https://digitalcommons.wku.edu/ijesab/vol11/iss1/60