ERIC Number: EJ1127304
Record Type: Journal
Publication Date: 2017
Abstractor: As Provided
Reference Count: 35
Reliability of a Cryoscopic Micro-Osmometer Using 15-µL Plasma Samples to Measure Hydration Status in Varied Environmental Conditions
Scanlan, Aaron T.; Richter-Stretton, Gina L.; Madueno, Maria C.; Borges, Nattai R.; Fenning, Andrew S.
Measurement in Physical Education and Exercise Science, v21 n1 p34-39 2017
Measurement of plasma osmolality (P[subscript osm]) remains popular for assessing hydration status in exercise science. However, a controlled reliability assessment of micro-osmometry using small sample volumes to measure Posm remains to be performed. This study aimed to examine the reliability of a cryoscopic micro-osmometer requiring 15-µL samples across varied environmental conditions. Thirteen young adults (26.4 ± 5.7 years) completed a 20-min steady-state cycling protocol on separate occasions in cool/dry conditions and hot/humid conditions. P[subscript osm] was assessed using fingertip capillary samples taken in duplication prior to and following 20-min acclimatization and recovery periods around the cycling bout. Absolute (typical error of measurement = 0.62-0.83 mOsmol·kg[superscript -1]; coefficient of variation = 0.9% to 1.3%) and relative (intraclass correlation coefficient = 0.60-0.85) reliability of this approach were supported. These findings suggest micro-osmometry requiring small plasma samples (15 µL) can be reliably used by practitioners to assess longitudinal changes and cross-sectional hydration status in varied environmental conditions.
Descriptors: Reliability, Measurement Equipment, Young Adults, Physical Activities, Physical Environment, Water, Statistical Analysis
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A