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Increased Rider Weight Did Not Induce Changes in Behavior and Physiological Parameters in Horses

Christensen, Janne Winther and Bathellier, Suzie and Rhodin, Marie and Palme, Rupert and Uldahl, Mette (2020). Increased Rider Weight Did Not Induce Changes in Behavior and Physiological Parameters in Horses. Animals. 10 :1 , 1-10
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Abstract

Simple Summary: The influence of rider weight on horse welfare, health and performance is often debated. We measured the effects of increasing the weight of the regular rider by 15% and 25% on horse behavior, gait symmetry and physiological responses in a standard dressage test. Cortisol levels increased in response to exercise, but we found no effect of the weight treatment, i.e., cortisol levels did not increase when the rider became heavier. Behavior, heart rate and gait symmetry also did not differ between treatments. We conclude that increasing the weight of the regular rider by 15% and 25% did not result in significant short-term alterations in cortisol, heart rate, behavior and gait symmetry in horses during low-intensity exercise. Further studies are required to develop appropriate guidelines for rider weight.Abstract Recent studies have reported significant alterations in horse physiological and gait parameters when exposed to increased rider weight during moderate to high intensity exercise. This study aimed to evaluate the effect of increased rider weight (+15% and +25% of the regular rider's bodyweight) on horse behavioral, physiological and gait symmetry parameters during a standard dressage test. Twenty rider-horse equipages performed the same test three times in a randomized, crossover design. Salivary cortisol (SC), heart rate (HR), heart rate variability (HRV), behavior and gait symmetry (GS) were measured. SC concentrations increased from baseline (p < 0.001), but there was no significant treatment effect (difference from baseline (ng/mL): Control: 0.21 +/- 0.1; +15%: 0.37 +/- 0.1; +25%: 0.45 +/- 0.2, p = 0.52). Similarly, there were no overall treatment effects on HR or HRV variables (avg HR across treatments (bpm): 105.3 +/- 1.3), nor on GS parameters. There was large individual variation in conflict behavior but no effect of weight treatment. We conclude that increasing the weight of the regular rider by 15% and 25% did not result in significant short-term alterations in the measured parameters. Maximum rider:horse weight ratios were 15-23% and the exercise intensity was relatively low; thus the results should not be extrapolated to other weight ratios and exercise intensities.

Authors/Creators:Christensen, Janne Winther and Bathellier, Suzie and Rhodin, Marie and Palme, Rupert and Uldahl, Mette
Title:Increased Rider Weight Did Not Induce Changes in Behavior and Physiological Parameters in Horses
Year of publishing :2020
Volume:10
Number:1
Page range:1-10
Number of Pages:10
Publisher:MDPI
ISSN:2076-2615
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 403 Veterinary Science > Medical Bioscience
Keywords:behavior, dressage horse, gait symmetry, rider weight, saliva cortisol, welfare
URN:NBN:urn:nbn:se:slu:epsilon-p-104066
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-104066
Additional ID:
Type of IDID
DOI10.3390/ani10010095
Web of Science (WoS)000515364400095
ID Code:16787
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Anatomy, Physiology and Biochemistry
Deposited By: SLUpub Connector
Deposited On:26 Mar 2020 13:56
Metadata Last Modified:26 Mar 2020 13:57

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