Accuracy of urine color to detect equal to or greater than 2% body mass loss in men
Deutscher übersetzter Titel: | Messgenauigkeit eines Urintests zur Detektion von Verlust von 2% Körpermasse oder mehr bei Männern |
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Autor: | McKenzie, Amy L. ; Muñoz, Colleen X.; Armstrong, Lawrence E. |
Erschienen in: | Journal of athletic training |
Veröffentlicht: | 50 (2015), 12, S. 1306-1309, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 1062-6050, 0160-8320, 1938-162X |
DOI: | 10.4085/1062-6050-51.1.03 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201604002527 |
Quelle: | BISp |
Abstract des Autors
Context: Clinicians and athletes can benefit from field-expedient measurement tools, such as urine color, to assess hydration state; however, the diagnostic efficacy of this tool has not been established.
Objective: To determine the diagnostic accuracy of urine color assessment to distinguish a hypohydrated state (≥2% body mass loss [BML]) from a euhydrated state (<2% BML) after exercise in a hot environment.
Design: Controlled laboratory study.
Setting: Environmental chamber in a laboratory.
Patients or Other Participants: Twenty-two healthy men (age = 22 ± 3 years, height = 180.4 ± 8.7 cm, mass = 77.9 ± 12.8 kg, body fat = 10.6% ± 4.6%).
Intervention(s): Participants cycled at 68% ± 6% of their maximal heart rates in a hot environment (36°C ± 1°C) for 5 hours or until 5% BML was achieved. At the point of each 1% BML, we assessed urine color.
Main Outcome Measure(s): Diagnostic efficacy of urine color was assessed using receiver operating characteristic curve analysis, sensitivity, specificity, and likelihood ratios.
Results: Urine color was useful as a diagnostic tool to identify hypohydration after exercise in the heat (area under the curve = 0.951, standard error = 0.022; P < .001). A urine color of 5 or greater identified BML ≥2% with 88.9% sensitivity and 84.8% specificity (positive likelihood ratio = 5.87, negative likelihood ratio = 0.13).
Conclusions: Under the conditions of acute dehydration due to exercise in a hot environment, urine color assessment can be a valid, practical, inexpensive tool for assessing hydration status. Researchers should examine the utility of urine color to identify a hypohydrated state under different BML conditions.