title: Hydration Status over 24-H Is Not Affected by Ingested Beverage Composition.
abstract: OBJECTIVE
  To investigate the 24-h hydration status of healthy, free-living, adult males when given various combinations of different beverage types.
  
  
  METHODS
  Thirty-four healthy adult males participated in a randomized, repeated-measures design in which they consumed: water only (treatment A), water+cola (treatment B), water+diet cola (treatment C), or water+cola+diet cola+orange juice (treatment D) over a sedentary 24-h period across four weeks of testing. Volumes of fluid were split evenly between beverages within each treatment, and when accounting for food moisture content and metabolic water production, total fluid intake from all sources was equal to 35 ± 1 ml/kg body mass. Urine was collected over the 24-h intervention period and analyzed for osmolality (Uosm), volume (Uvol) and specific gravity (USG). Serum osmolality (Sosm) and total body water (TBW) via bioelectrical impedance were measured after the 24-h intervention.
  
  
  RESULTS
  24-h hydration status was not different between treatments A, B, C, and D when assessed via Uosm (590 ± 179; 616 ± 242; 559 ± 196; 633 ± 222 mOsm/kg, respectively) and Uvol (1549 ± 594; 1443 ± 576; 1690 ± 668; 1440 ± 566 ml) (all p > 0.05). A -difference in 24-h USG was observed between treatments A vs. D (1.016 ± 0.005 vs. 1.018 ± 0.007; p = 0.049). There were no differences between treatments at the end of the 24-h with regard to Sosm (291 ± 4; 293 ± 5; 292 ± 5; 293 ± 5 mOsm/kg, respectively) and TBW (43.9 ± 5.9; 43.8 ± 6.0; 43.7 ± 6.1; 43.8 ± 6.0 kg) (all p > 0.05).
  
  
  CONCLUSIONS
  Regardless of the beverage combination consumed, there were no differences in providing adequate hydration over a 24-h period in free-living, healthy adult males. This confirms that beverages of varying composition are equally effective in hydrating the body.
authors: a Department of Health, Human Performance, and Recreation, University of Arkansas , Fayetteville , Arkansas.
authors: Matthew A
authors: MA
authors: Tucker
authors: Matthew S
authors: MS
authors: Ganio
authors: J D
authors: JD
authors: Adams
authors: Lemuel A
authors: LA
authors: Brown
authors: Christian B
authors: CB
authors: Ridings
authors: Jenna M
authors: JM
authors: Burchfield
authors: Forrest B
authors: FB
authors: Robinson
authors: Jamie L
authors: JL
authors: McDermott
authors: Brett A
authors: BA
authors: Schreiber
authors: Nicole E
authors: NE
authors: Moyen
authors: Tyrone A
authors: TA
authors: Washington
authors: Andrea C
authors: AC
authors: Bermudez
authors: Meredith P
authors: MP
authors: Bennett
authors: Maxime E
authors: ME
authors: Buyckx
mesh_terms: D000328:Adult; D001628:Beverages; D001834:Body Water / Q000378:metabolism; D002110:Caffeine; D002253:Carbonated Beverages; D032084:Citrus sinensis; D003681:Dehydration / Q000209:etiology / Q000517:prevention & control; D004032:Diet; D019422:Dietary Sucrose; D004326:Drinking; D060766:Drinking Water; D017097:Electric Impedance; D005247:Feeding Behavior; D000067030:Fruit and Vegetable Juices; D006801:Humans; D008297:Male; D009994:Osmolar Concentration; D012016:Reference Values; D013997:Time Factors; D016482:Urinalysis; D014554:Urination; D055815:Young Adult
chemical_list: D019422:Dietary Sucrose; D060766:Drinking Water; D002110:Caffeine