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Errors of measurement for blood parameters, physiological and performance measures after the decay of short-term heat acclimation

Garrett, Andrew T.; Rehrer, Nancy J.; Patterson, Mark J.; Simpson, Andrew J.; Cotter, James D.

Authors

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Dr Andrew Garrett A.Garrett@hull.ac.uk
Senior Lecturer in Exercise and Environmental Physiology

Nancy J. Rehrer

Mark J. Patterson

James D. Cotter



Abstract

Introduction: It is important to determine the accuracy of measurements relative to potential treatment effects, with time intervals between tests. Purpose: The aim of this study was to assess the error of measurement for blood parameters, physiological, and performance measures after the decay of short-term heat acclimation.

Methods: Ten trained males (Mean±SD: age 28±7 y; body mass 74.6±4.4 kg; 4.26±0.37 L.min-1; peak power output (PPO) 329±42 W) completed an exercising heat stress test (HST) at baseline, 2nd day after acclimation and then during decay at 1, 2, 3 and 5-6 wks. CoV (95% CI), SE (95% CI) and Pearsons (r) were used for analysis of blood volume (blood, plasma, red cell volume, mean hemoglogin mass); plasma (aldosterone, arginine vasopressin [AVP], total protein, albumin, sodium); physiological (rectal temperature, cardiac frequency) and performance (exercise performance capacity, PPO).

Results: The CoV (95% CI), SE (95% CI) and r with a 1-wk interval for blood volume was 2.3% (1.6 to 4.3; 1.9 [1.3 to 3.4 mL.Kg-1]; r=0.93; n=10). After 2-wk and 5-6 wks this had increased to 4.9% (3.4 to 9.3; 3.8 [2.6 to 7.0 mL.Kg-1]; r=0.76; n=9) and 5.5% (3.6 to 12.8; 4.5 [2.9 to 10.0 mL.Kg-1]; r=0.65; n=7) respectively.

Conclusions: Blood volume and physiological measures demonstrated the least error one week apart but increased thereafter. Plasma concentrations and performance markers had the greatest error with repeat measures after one week. Therefore, for greater reliability and low measurement error measures should be taken no more than one week a part in repeated experimentation.

Citation

Garrett, A. T., Rehrer, N. J., Patterson, M. J., Simpson, A. J., & Cotter, J. D. (2022). Errors of measurement for blood parameters, physiological and performance measures after the decay of short-term heat acclimation. Journal of Human Performance in Extreme Environments, 17(1), Article 5. https://doi.org/10.7771/2327-2937.1140

Journal Article Type Article
Acceptance Date Nov 29, 2021
Online Publication Date May 5, 2022
Publication Date 2022
Deposit Date Jan 6, 2022
Publicly Available Date May 11, 2022
Journal Journal of Human Performance in Extreme Environments
Print ISSN 1529-5168
Publisher Purdue University Press
Peer Reviewed Peer Reviewed
Volume 17
Issue 1
Article Number 5
DOI https://doi.org/10.7771/2327-2937.1140
Keywords Blood volume; Standard error; Reliability
Public URL https://hull-repository.worktribe.com/output/3887718

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https://creativecommons.org/licenses/by-nc-nd/4.0/

Copyright Statement
This is an Open Access journal. This means that it uses a funding model that does not charge readers or their institutions for access. Readers may freely read, download, copy, distribute, print, search, or link to the full texts of articles. This journal is covered under the CC BY-NC-ND license.



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