Evans et al submission IJSNEM revision 2.pdf (210.75 kB)
A sodium drink enhances fluid retention during 3 hours of post-exercise recovery when ingested with a standard meal
journal contribution
posted on 2017-12-13, 10:11 authored by Gethin H. Evans, Jennifer Miller, Sophie Whiteley, Lewis JamesLewis JamesThe purpose of this study was to examine the efficacy of water and a 50 mmol/L NaCl solution on postexercise rehydration when a standard meal was consumed during rehydration. Eight healthy participants took part in two experimental trials during which they lost 1.5 ± 0.4% of initial body mass via intermittent exercise in the heat. Participants then rehydrated over a 60-min period with water or a 50 mmol/L NaCl solution in a volume equivalent to 150% of their body mass loss during exercise. In addition, a standard meal was ingested during this time which was equivalent to 30% of participants predicted daily energy expenditure. Urine samples were collected before and after exercise and for 3 hr after rehydration. Cumulative urine volume (981 ± 458 ml and 577 ± 345 mL; p = .035) was greater, while percentage fluid retained (50 ± 20% and 70 ± 21%; p = .017) was lower during the water compared with the NaCl trial respectively. A high degree of variability in results was observed with one participant producing 28% more urine and others ranging from 18-83% reduction in urine output during the NaCl trial. The results of this study suggest that after exercise induced dehydration, the ingestion of a 50 mmol/L NaCl solution leads to greater fluid retention compared with water, even when a meal is consumed postexercise. Furthermore, ingestion of plain water may be effective for maintenance of fluid balance when food is consumed in the rehydration period.
History
School
- Sport, Exercise and Health Sciences
Published in
International Journal of Sport Nutrition and Exercise MetabolismVolume
27Issue
4Pages
344 - 350Citation
EVANS, G.H. ... et al, 2017. A sodium drink enhances fluid retention during 3 hours of post-exercise recovery when ingested with a standard meal. International Journal of Sport Nutrition and Exercise Metabolism, 27 (4), pp. 344-350.Publisher
© Human Kinetics, Inc.Version
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2017-02-20Publication date
2017-01-30Notes
Accepted author manuscript version reprinted, by permission, from International Journal of Sport Nutrition and Exercise Metabolism, 2017, 27 (4): pp344-pp350, https://doi.org/10.1123/ijsnem.2016-0196. © Human Kinetics, Inc.ISSN
1526-484XeISSN
1543-2742Publisher version
Language
- en