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Reduction of the A-Frame angle of incline does not change the maximum carpal joint extension angle in agility dogs entering the A-Frame

Appelgrein, C., Glyde, M.R., Hosgood, G., Dempsey, A.R. and Wickham, S. (2018) Reduction of the A-Frame angle of incline does not change the maximum carpal joint extension angle in agility dogs entering the A-Frame. Veterinary and Comparative Orthopaedics and Traumatology, 31 (2). pp. 77-82.

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Abstract

Objective This article aims to investigate the effect of a decrease in the A-frame angle of incline on the highest carpal extension angle in agility dogs.

Methods Kinematic gait analysis (two-dimensional) measuring carpal extension was performed on 40 dogs entering the A-frame at 3 angles of incline: 40° (standard), 35° and 30°. The highest carpal extension angle from three trials at each incline was examined for a significant effect of A-frame angle with height, body weight and velocity included as covariates.

Results There was no significant effect of A-frame angle on the highest carpal joint extension angle for the first or second limb. The adjusted mean carpal extension angle for the first limb at 40° was 64° [95% confidence interval (CI), 60–68), at 35° was 61° (95% CI, 57–65) and at 30° was 62° (95% CI, 59–65). The raw mean carpal extension angle for all dogs across all A-frame angles for the first limb was 62° (95% CI, 60–64) and the second limb was 61° (95% CI, 59–63).

Clinical Significance Decreasing the A-frame angle of incline from 40° to 30° did not result in reduced carpal extension angles. The failure to find a difference and the narrow CI of the carpal angles may indicate that the physiologic limits of carpal extension were reached at all A-frame angles.

Publication Type: Journal Article
Murdoch Affiliation: School of Psychology and Exercise Science
Publisher: Schattauer
Copyright: © 2018 Georg Thieme Verlag KG
URI: http://researchrepository.murdoch.edu.au/id/eprint/40627
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