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The Hyperhydration Potential of Sodium Bicarbonate and Sodium Citrate.

Authors :
Siegler, Jason C.
Carr, Amelia J.
Jardine, William T.
Convit, Lilia
Cross, Rebecca
Chapman, Dale
Burke, Louise M.
Ross, Megan
Source :
International Journal of Sport Nutrition & Exercise Metabolism; Mar2022, Vol. 32 Issue 2, p74-81, 8p, 1 Diagram, 1 Chart, 4 Graphs
Publication Year :
2022

Abstract

Buffering agents have not been comprehensively profiled in terms of their capacity to influence water retention prior to exercise. The purpose of this investigation was to profile the fluid retention characteristics of sodium bicarbonate (BIC) and sodium citrate (CIT) to determine the efficacy of these buffering mediums as hyperhydrating agents. Nineteen volunteers (13 males and six females; age = 28.3 ± 4.9 years) completed three trials (randomized and cross-over design). For each trial, a baseline measurement of body mass, capillary blood, and urine was collected prior to ingestion of their respective condition (control condition [CON] = 25 ml/kg artificially sweetened water; BIC condition = CON + 7.5 g/L of sodium in the form of BIC; CIT condition = CON + 7.5 g/L of sodium in the form of CIT). The fluid loads were consumed in four equal aliquots (0, 20, 40 and 60 min; fluid intake was 1.972 ± 361 ml [CON]; 1.977 ± 360 ml [BIC]; 1.953 ± 352 ml [CIT]). Samples were recorded at 20 (body mass and urine) and 60 min (blood) intervals for 180 min. Blood buffering capacity (HCO<subscript>3</subscript><superscript>−</superscript>) was elevated (p <.001) in both BIC (32.1 ± 2.2 mmol/L) and CIT (28.9 ± 3.8 mmol/L) at 180 min compared with CON (25.1 ± 1.8 mmol/L). Plasma volume expansion was greater (p <.001) in both BIC (8.1 ± 1.3%) and CIT (5.9 ± 1.8%) compared with CON (−1.1 ± 1.4%); whereas, total urine production was lower in BIC and CIT at 180 min (BIC vs. CON, mean difference of 370 ± 85 ml; p <.001; CIT vs. CON, mean difference of 239 ± 102 ml; p =.05). There were no increases observed in body mass (p =.9). Under resting conditions, these data suggest BIC and CIT induce a greater plasma hypervolemic response as compared with water alone. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1526484X
Volume :
32
Issue :
2
Database :
Complementary Index
Journal :
International Journal of Sport Nutrition & Exercise Metabolism
Publication Type :
Academic Journal
Accession number :
157332329
Full Text :
https://doi.org/10.1123/ijsnem.2021-0179