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Full-Text Articles in Fluids and Secretions
Time Of Urine Sampling May Influence The Association Between Urine Specific Gravity And Body Composition, Patrick B. Wilson, Brian K. Ferguson, Ian P. Winter
Time Of Urine Sampling May Influence The Association Between Urine Specific Gravity And Body Composition, Patrick B. Wilson, Brian K. Ferguson, Ian P. Winter
Exercise Science Faculty Publications
Urine specific gravity (USG) is frequently utilized in sports practice and research to assess hydration status. Prior research suggests that individuals with large amounts of fat-free mass (FFM) and muscle have elevated USG, but little is known about whether the time of collection (first-morning vs. spot sampling) and various nutritional factors influence these relationships. This cross-sectional, observational study assessed fasted first-morning (n = 55) and non-fasted spot USG (n = 51) samples in adults and evaluated relationships of USG with body composition and nutrition intake. The InBody 770 was used to estimate FFM, skeletal muscle mass (SMM), and total body …
Reliability And Minimal Detectable Change Of The Mx3 Hydration Testing System, Ian Winter, Josie Burdin, Patrick B. Wilson
Reliability And Minimal Detectable Change Of The Mx3 Hydration Testing System, Ian Winter, Josie Burdin, Patrick B. Wilson
Exercise Science Faculty Publications
Assessing hydration status outside of laboratories can be challenging given that most hydration measures are invasive, stationary, costly, or have questionable validity. This study investigated the within-day, test-retest reliability, and minimal detectable change (MDC) of the MX3 Hydration Testing System (MX3 Diagnostics), a relatively low cost, noninvasive, and portable method to measure saliva osmolality. Seventy-five adults (44 men, 31 women; 29.6±10.8 yr, 171.1±9.2 cm, 79.1±15.4 kg) presented two saliva samples approximately 3 to 5 minutes apart. Fluid intake was avoided for at least 5 minutes prior to sample collections. For each sample collection, a researcher used the MX3 to tap …