Comparison of post-exercise cooling methods in horses

Presentation


Kang, H., Zsoldos, R. R., Skinner, J. E., Gaughan, J. B. and Guitart, A. S.. 2021. "Comparison of post-exercise cooling methods in horses." 2021 Equine Science Society Virtual Symposium. Champaign, United States 01 - 04 Jun 2021 United States. https://doi.org/10.1016/j.jevs.2021.103485
Paper/Presentation Title

Comparison of post-exercise cooling methods in horses

Presentation TypePresentation
AuthorsKang, H. (Author), Zsoldos, R. R. (Author), Skinner, J. E. (Author), Gaughan, J. B. (Author) and Guitart, A. S. (Author)
Journal or Proceedings TitleJournal of Equine Veterinary Science, vol. 100
Journal Citation100
Article Number103485
Number of Pages1
Year2021
Place of PublicationUnited States
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jevs.2021.103485
Conference/Event2021 Equine Science Society Virtual Symposium
Event Details
2021 Equine Science Society Virtual Symposium
Delivery
Online
Event Date
01 to end of 04 Jun 2021
Event Location
Champaign, United States
Abstract

Exertional heat illness (EHI) following strenuous exercise un- der hot and humid conditions can be detrimental in horses. Direct cooling after intense exercise is necessary to prevent EHI. There- fore, this study aimed to evaluate the efficacy of 3 cooling meth- ods in horses post treadmill exercise. Five mature geldings were treadmill exercised on 3 consecutive weeks to determine the effect of 3 post-exercise cool-down methods (5 ×3 Latin square design). These methods were (i) no water application (W no ), (ii) cold water application only (W only ; pouring 30 L of cold water (6 °C) every min for 6 min) and (iii) cold water application with scraping (W scraping ; cold water (6 °C) application followed by scraping after each wa- ter application). After 6 min active cool-down phase, the horses were walked in-hand (walking phase) for 4 min and stood (stand- ing phase) for 35 min. Central venous temperature (T CV ) and rec- tal temperature (T R ) were selected and measured simultaneously. The collected temperatures were paired and statistically analyzed by Wilcoxon signed rank test to assess the efficiency of cooling be- tween methods. The room temperature and humidity in the tread- mill room for the treadmill exercise was (mean ±SD) 27.2 ±1.3 °C and 49.9 ±7.2% and in the corridor for cooling down was 30.0 ±2.2 °C and 49.0 ±8.6%. Greater T CV and T R reductions were ob- served when cold water (W only & W scraping ) was applied compared with no water application (W no ) (T CV : −0.91 °C for W only -W no , P < 0.001, −0.84 °C for W scraping -W no , P < 0.001; T R : −0.31 °C for W only - W no , P < 0.001, −0.29 °C for W scraping -W no , P < 0.001), and overall the water application had more cooling down effect on T CV than T R ( −0.57 °C, P < 0.001). Between the 2 applied cold water meth- ods, significantly lower body temperatures (T CV −0.11 °C, P = 0.01; T R −0.03 °C, P = 0.01) were observed with W only than W scraping . This study demonstrates that constant contact with water is more im- portant for heat conduction and more effective than producing and using sweat evaporation to remove heat. Application of wa- ter without scraping may help decrease the core body temperature in horses more effectively in the early stage of EHI.

Keywords: Heat Stress, Exercise, Cool-Down

Keywordsheat stress, exercise, cool-down
ANZSRC Field of Research 2020300302. Animal management
300999. Veterinary sciences not elsewhere classified
300306. Animal welfare
Byline AffiliationsUniversity of Queensland
School of Sciences
Institution of OriginUniversity of Southern Queensland
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