- Title
- Reliability of a cryoscopic micro-osmometer using 15-mu L plasma samples to measure hydration status in varied environmental conditions
- Creator
- Scanlan, Aaron T.; Richter-Stretton, Gina L.; Madueno, Maria C.; Borges, Nattai R.; Fenning, Andrew S.
- Relation
- Measurement in Physical Education and Exercise Science Vol. 21, Issue 1, p. 34-39
- Publisher Link
- http://dx.doi.org/10.1080/1091367X.2016.1248767
- Publisher
- Routledge
- Resource Type
- journal article
- Date
- 2017
- Description
- Measurement of plasma osmolality (Posm) 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. Posm 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 = .62–.83 mOsmol·kg⁻¹; coefficient of variation = .9% to 1.3%) and relative (intraclass correlation coefficient = .60–.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.
- Subject
- osmolality; capilliary; heat; humidity; thermoregulation
- Identifier
- http://hdl.handle.net/1959.13/1391951
- Identifier
- uon:33307
- Identifier
- ISSN:1091-367X
- Rights
- This is an Accepted Manuscript of an article published by Taylor & Francis in Measurement in Physical Education and Exercise Science on 17 November 2016, available online: https://www.tandfonline.com/doi/full/10.1080/1091367X.2016.1248767
- Language
- eng
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