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Research article - Peer-reviewed, 2020

Asymmetries of horses walking and trotting on treadmill with and without rider

Bystrom, Anna; Clayton, Hilary M.; Hernlund, Elin; Roepstorff, Lars; Rhodin, Marie; Braganca, Filipe S.; Engell, Maria T.; van Weeren, Rene; Weishaupt, Michael A.; Egenvall, Agneta

Abstract

Background Left-right movement symmetry is a highly desirable characteristic in sport horses.Objectives This study compared movement symmetry in well-trained dressage horses in unridden and unrestrained position and ridden in a dressage frame, and investigated possible associations between gaits.Study design Experimental study.Methods Seven sound, high-level dressage horses were measured at walk and sitting trot on a treadmill at several speeds under two conditions: with and without rider. Left-right differences in stance duration, stance protraction and retraction based on longitudinal hoof positions, ipsilateral limb tracking, minimum and maximum vertical positions of the dorsal spinous processes of the sixth thoracic (T6), third sacral vertebrae (S3) and wing of atlas, and vertical ground reaction forces were calculated and analysed in mixed models.Results At walk, five body variables indicated increased asymmetry in the ridden condition compared with unridden condition: forelimb stance duration (unridden/ridden left-right differences 9 vs 13 ms; P = .008), forelimb stance protraction (P = .004), stance retraction (P = .001) and first force peak (P = .003), and hindlimb stance retraction (P = .01). At trot, six body variables were more asymmetrical in the ridden condition: forelimb stance duration (2.5 vs 3.8 ms, P = .004); hindlimb stance protraction (P < .0001) and retraction (P = .01), T6 minimum (4 vs 6 mm, P = .001), T6 maximum (9 vs 11 mm, P = .01) and S3 maximum (6 vs 12 mm, P < .001). Five variables had significant associations between asymmetries at walk and trot, but only three demonstrated a positive slope.Main limitations A limited number of horses and riders were studied. Measurements were performed on a treadmill.Conclusions High-level horses moved slightly more asymmetrically when ridden in a dressage frame than in the unridden condition.

Keywords

horse; gait asymmetry; kinematics; kinetics; sidedness; lameness

Published in

Equine Veterinary Journal
2020, volume: 53, number: 1, pages: 157-166
Publisher: WILEY

Authors' information

Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry (AFB)
Clayton, Hilary M.
Michigan State Univ
Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry (AFB)
Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry (AFB)
Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry (AFB)
Braganca, Filipe S.
Univ Utrecht
Engell, Maria Terese
Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry (AFB)
van Weeren, Rene
Univ Utrecht
Weishaupt, Michael A.
Univ Zurich
Swedish University of Agricultural Sciences, Department of Clinical Sciences

UKÄ Subject classification

Medical Bioscience

Publication Identifiers

DOI: https://doi.org/10.1111/evj.13252

URI (permanent link to this page)

https://res.slu.se/id/publ/105366