Comparison of post-exercise cooling methods in horses

Kang, H. and Zsoldos, R. R. and Skinner, J. E. ORCID: https://orcid.org/0000-0003-0270-0740 and Gaughan, J. B. and Guitart, A. S. (2021) Comparison of post-exercise cooling methods in horses. In: 2021 Equine Science Society Virtual Symposium, 1 June - 4 June 2021, Champaign, IL, 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


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Speech)
Refereed: Yes
Item Status: Live Archive
Additional Information: Virtual symposium.
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 - 31 Dec 2021)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 - 31 Dec 2021)
Date Deposited: 24 Jan 2022 23:30
Last Modified: 16 May 2022 23:04
Uncontrolled Keywords: heat stress, exercise, cool-down
Fields of Research (2008): 07 Agricultural and Veterinary Sciences > 0702 Animal Production > 070203 Animal Management
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079999 Agricultural and Veterinary Sciences not elsewhere classified
Fields of Research (2020): 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3003 Animal production > 300302 Animal management
30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3009 Veterinary sciences > 300999 Veterinary sciences not elsewhere classified
30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3003 Animal production > 300306 Animal welfare
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
B Economic Development > 83 Animal Production and Animal Primary Products > 8399 Other Animal Production and Animal Primary Products > 839901 Animal Welfare
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280101 Expanding knowledge in the agricultural, food and veterinary sciences
10 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 1099 Other animal production and animal primary products > 109902 Animal welfare
Identification Number or DOI: https://doi.org/10.1016/j.jevs.2021.103485
URI: http://eprints.usq.edu.au/id/eprint/44083

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