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Owen, JA, Fortes, MB, Rahman, SU, Jibani, M, Walsh, NP and Oliver, SJ (2019) Hydration Marker Diagnostic Accuracy to Identify Mild Intracellular and Extracellular Dehydration. International Journal of Sport Nutrition & Exercise Metabolism, 29 (6). pp. 604-611. ISSN 1543-2742
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Hydration marker diagnostic accuracy to identify mild intracellular and extracellular dehydration.pdf - Accepted Version Download (934kB) | Preview |
Abstract
Identifying mild dehydration (</=2% of body mass) is important to prevent the negative effects of more severe dehydration on human health and performance. It is unknown whether a single hydration marker can identify both mild intracellular and extracellular dehydration with adequate diagnostic accuracy (>/=0.7 receiver operating characteristic-area under the curve (ROC-AUC)). Thus, in 15 young healthy men, we determined the diagnostic accuracy of 15 hydration markers after three randomized 48-h trials; euhydration (EU, water 36 ml.kg.d(-1)), intracellular dehydration caused by exercise and 48 h of fluid restriction (ID, water 2 ml.kg.d(-1)), and extracellular dehydration caused by a 4 h diuretic-induced diuresis, begun at 44 h (ED, Furosemide 0.65 mg.kg(-1)). Body mass was maintained on EU and dehydration was mild on ID and ED (1.9 (0.5)% and 2.0 (0.3)% of body mass, respectively). Urine color, urine specific gravity, plasma osmolality, saliva flow rate, saliva osmolality, heart rate variability and dry mouth identified ID (ROC-AUC; range 0.70-0.99) and postural heart rate change identified ED (ROC-AUC 0.82). Thirst 0-9 scale (ROC-AUC 0.97 and 0.78 for ID and ED) and urine osmolality (ROC-AUC 0.99 and 0.81 for ID and ED) identified both dehydration types. However, only thirst 0-9 scale had a common dehydration threshold (>/=4; sensitivity and specificity of 100%, 87% and 71%, 87% for ID and ED). In conclusion, using a common dehydration threshold >/=4, the thirst 0-9 scale identified mild intracellular and extracellular dehydration with adequate diagnostic accuracy. In young healthy adults' thirst 0-9 scale is a valid and practical dehydration-screening tool.
| Item Type: | Article |
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| Additional Information: | Accepted author manuscript version reprinted, by permission, from International Journal of Sport Nutrition & Exercise Metabolism, 2019, 29 (6): 604-611pp-pp, https://doi.org/10.1123/ijsnem.2019-0022. © Human Kinetics, Inc. [or other copyright notice shown in journal, if different] |
| Uncontrolled Keywords: | 1106 Human Movement and Sports Sciences, 1116 Medical Physiology |
| Subjects: | R Medicine > RC Internal medicine > RC1200 Sports Medicine |
| Divisions: | Sport & Exercise Sciences |
| Publisher: | Human Kinetics |
| Related URLs: | |
| Date Deposited: | 15 Feb 2022 12:28 |
| Last Modified: | 15 Feb 2022 12:30 |
| DOI or ID number: | 10.1123/ijsnem.2019-0022 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/16300 |
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