Related Experiment Video
Updated: Aug 16, 2026

Evaluation of Fluid Overload by Bioelectrical Impedance Vectorial Analysis
Published on: August 17, 2022
Hydration assessment techniques
1Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Unit 1110, 2095 Hillside Road, Storrs, CT 06269-1110, USA. lawrence.armstrong@uconn.edu
Abstract:
Water in the human body is essential for metabolism, temperature regulation, and numerous other physiological processes that are consistent with good health. Accurate, precise, and reliable methods to assess body fluid compartments are needed. This review describes the hydration assessment techniques of isotope dilution, neutron activation analysis, bioelectrical impedance, body mass change, thirst, tracer appearance, hematologic indices, and urinary markers. It also provides guidance for selecting techniques that are appropriate for use with unique individuals and situations.
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Prepare for the Procedure:
Disorder of Water Balance
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...