"Hydration Assessment Device for Determination of Hydration Status" by Ciriany Arrazola, Marcos Keefe et al.
  •  
  •  
 

Abstract

Euhydration, defined as the state of optimal total body water content, is essential for maintaining proper physiological function across multiple systems and organs. However, there is currently a lack of assessment that can provide a rapid, non-invasive and cost-effective diagnosis of hydration status. PURPOSE: To evaluate the validity of the commercial accessible hydration sensor in determining hydration status compared to urine and blood indices. METHODS: Twenty-eight participants (age: 23 ± 3 yr; body mass: 73.38 ± 17.03 kg; height: 169.90 ± 9.07 cm) completed this study. Twenty participants performed the first experimental design, whereas eight participants performed the second protocol. In the first protocol, participants arrived to the laboratory in a euhydrated state (urine specific gravity [USG] < 1.020) and performed baseline measures (blood sample, urine sample, and hydration device reading). Then, a dehydrating exercise protocol in the heat (33°C, 30% relative humidity) was performed which involved two 30-min cycling sets separated by a small rest period. Following this, a 2-hr rehydration protocol via fluid consumption was carried out. Outcome measures were collected during the rest period of the exercise, and at the 1- and 2-hr timepoints during the rehydration protocol. In the second experimental design, a similar approach to the first protocol was performed. However, the dehydrating exercise involved cycles of running in the heat until ≥ 2% body mass loss (BML) was obtained. Receiver operating characteristics analysis was performed to calculate sensitivity (SENS) and specificity (SPEC) of the total score from the hydration device in detecting a dehydrated or euhydrated state compared to urine and blood hydration indices. A hydration device total score > 0 indicated euhydrated, while < 0 indicated dehydrated. When comparing the hydration device to urine and blood indices, the following cut-off points were used to determine dehydration: USG ≥ 1.020, urine osmolality (UOSM) > 700 mOsmol, and plasma osmolality (POSM) > 290 mOsmol. RESULTS: The hydration device total score resulted in low to moderate SENS and SPEC for USG (SENS: 0.656; SPEC: 0.000), UOSM (SENS: 0.667; SPEC: 0.250), and POSM (SENS: 0.679; SPEC: 0.286). CONCLUSION: These findings suggest that the hydration device is not accurate for determining euhydration or dehydration when compared to typical urine and blood hydration markers.

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.