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Keywords: horse
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Journal Articles
J Exp Biol (2020) 223 (7): jeb219154.
Published: 01 April 2020
... measured at a commercial laboratory (Vetpath, Ascot, WA, Australia) using an Immulite 2000 XPi (Siemens Healthcare, Brisbane, QLD, Australia). Plasma aGLP-1 was measured using a commercially available ELISA (Millipore, Abacus ALS, Meadowbrook, QLD, Australia) previously validated for use in horses ( de...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (16): jeb204107.
Published: 23 August 2019
...Zoe T. Self Davies; Andrew J. Spence; Alan M. Wilson ABSTRACT The horse has evolved to gallop economically at high speed. Limb force increases with speed but direct measures of limb ground reaction forces (GRFs) at gallop are sparse. This study reports GRFs for multiple limbs, using force plates...
Journal Articles
J Exp Biol (2011) 214 (1): 104–112.
Published: 01 January 2011
... research suggests that breed-specific growth rates influence the maturation of the neural networks generating chewing rhythm, which may be altered because of changes in jaw mass during early postnatal growth. Here, we explored the intraspecific scaling of CCD within a sample of adult horses ranging from...
Journal Articles
J Exp Biol (2009) 212 (15): 2454–2463.
Published: 01 August 2009
... 190–269 mm,assuming 5% strain, based on data from horses with biceps MTUs approximately 400 mm long ( Wilson et al.,2003 ; Watson and Wilson,2007 ). Five MTUs were lengthened by 12 mm and 22 mm and three of these were also lengthened by 26 mm. We adjusted the initial length of the muscles so that...
Includes: Supplementary data
Journal Articles
J Exp Biol (2008) 211 (24): 3836–3849.
Published: 15 December 2008
..., thoroughbred horses and elite human athletes. In each case, an absolute speed limit is definable, and the current record approaches that predicted maximum. While all such extrapolations must be used cautiously, these data suggest that there are limits to the ability of either natural or artificial selection to...
Journal Articles
J Exp Biol (2008) 211 (6): 945–956.
Published: 15 March 2008
... increases with the PE of the animal. In this study we investigate the mechanical energy ( ME ) fluctuations and the mechanical cost of transport (MCT) in six horses galloping up a range of gradients. We captured trunk movement with a six degrees-of-freedom inertial sensor mounted over the dorsal spinous...
Journal Articles
J Exp Biol (2008) 211 (6): 935–944.
Published: 15 March 2008
... locomotion would enhance our understanding of locomotor powering during changes in terrain. This study measured foot-on and foot-off times from galloping horses using a previously validated system of limb-mounted accelerometers and a global positioning system data logger. A detailed track survey provided...
Journal Articles
J Exp Biol (2007) 210 (16): 2795–2800.
Published: 15 August 2007
... continuous scale of colours or does the neutral point divide their chromatic space into two colour categories, i.e. into colours of either short or long wavelengths? We trained horses to different colour combinations in a two-choice behavioural experiment and tested their responses to the training and test...
Journal Articles
J Exp Biol (2006) 209 (21): 4389–4397.
Published: 01 November 2006
... extracted using a general linear model with speed, lead or non-lead and fore- or hind- as fixed factors, and horse identity as a random factor, using SPSS (SPSS 12.0 for Windows, SPSS Inc., USA). Best-fit curves were estimated for each variable for both fore- and hindlimbs for each individual according to...
Journal Articles
J Exp Biol (2006) 209 (19): 3742–3757.
Published: 01 October 2006
... with fluctuations in mechanical energy, even in the most efficient animals. In this study we investigate the exchanges between different forms of mechanical energy involved in high-speed gallop locomotion in Thoroughbred race horses during over-ground locomotion using innovative, mobile data collection...
Journal Articles
J Exp Biol (2006) 209 (3): 455–465.
Published: 01 February 2006
... compensate for the effects of size differences. Here we apply this principle to understanding the effects of size on locomotion within a species: the domestic horse. We predict that, without any factor to compensate for size differences, detectable deviations from dynamically similar locomotion would occur...
Journal Articles
J Exp Biol (2005) 208 (13): 2503–2514.
Published: 01 July 2005
... position using a modified version of a commercial inertial orientation sensor that combines accelerometers, gyroscopes and magnetometers, thus giving a full set of movement parameters (displacement,velocity and acceleration in three dimensions). The 35 g sensor was attached over the spine of a horse...
Journal Articles
J Exp Biol (2004) 207 (21): 3639–3648.
Published: 01 October 2004
... 2004 2004 ground reaction force field locomotion accelerometer duty factor horse The maximum vertical ground reaction force (peak GRFz) experienced by an individual limb during ground contact has been shown to constrain maximum running speed in humans and has been proposed as a...
Journal Articles
J Exp Biol (2004) 207 (20): 3507–3514.
Published: 15 September 2004
... the hindlimbs in quadrupeds. However, there are no whole-animal kinetic measurements of incline locomotion. Based on previous related research, we hypothesized that there would be a shift in forces to the hindlimb. The present study measured the force produced by the fore- and hindlimbs of horses...
Journal Articles
J Exp Biol (2004) 207 (4): 667–674.
Published: 01 February 2004
...Darren J. Dutto; Donald F. Hoyt; Hilary M. Clayton; Edward A. Cogger; Steven J. Wickler SUMMARY The ability to jump over an obstacle depends upon the generation of work across the joints of the propelling limb(s). The total work generated by one hind limb of a horse and the contribution to the...
Journal Articles
J Exp Biol (2003) 206 (9): 1557–1564.
Published: 01 May 2003
...Steven J. Wickler; Donald F. Hoyt; Edward A. Cogger; Gregory Myers SUMMARY Two studies have focused on potential triggers for the trot–gallop transition in the horse. One study concluded that the transition was triggered by metabolic economy. The second study found that it was not metabolic factors...
Journal Articles
J Exp Biol (2003) 206 (8): 1325–1336.
Published: 15 April 2003
...M. Polly McGuigan; Alan M. Wilson SUMMARY A horse's legs are compressed during the stance phase, storing and then returning elastic strain energy in spring-like muscle-tendon units. The arrangement of the muscle-tendon units around the lever-like joints means that as the leg shortens the muscle...
Journal Articles
J Exp Biol (1991) 155 (1): 245–259.
Published: 01 January 1991
...CLAUDIO L. LAFORTUNA; FRANCO SAIBENE The respiratory mechanics together with the rate of work of breathing were studied in five healthy adult Standardbred horses at rest and during different levels of exercise on a treadmill (0.8-2.3 ms −1 , 7% slope). In three of the horses the stride frequency...