Comparative ergoespirometric adaptations to a treadmill exercise test in untrained show Andalusian and Arabian horses |
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Authors: | Cristina Castejón-Riber Ana Mu?oz Pablo Trigo Cristina Riber Rafael Santisteban Francisco Castejón |
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Institution: | (1) Equine Sport Medicine Centre (CEMEDE), School of Veterinary Medicine, University of C?rdoba, C?rdoba, Spain;(2) Department of Animal Medicine and Surgery, School of Veterinary Medicine, University of C?rdoba, C?rdoba, Spain;(3) Department of Cellular Biology, Physiology and Immunology, School of Veterinary Medicine, University of C?rdoba, C?rdoba, Spain;; |
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Abstract: | Significant differences exist in the respiratory adaptation to exercise in different equine breeds. This research describes
the ergoespirometric response to exercise of Andalusian (AN) and Arabian (A) horses, both selected according to morphological
criteria. Thirteen untrained male horses (6 AN and 7 A) performed a treadmill exercise test (TET) with a slope of 6%, with
workloads starting from 5 m/s and increasing 1 m/s every 3 min until the horses were not able to keep the required velocity.
Tidal volume (TV), respiratory rate, minute ventilation (VE), oxygen uptake (VO2), carbon dioxide production, peak oxygen
uptake (VO2peak), respiratory exchange ratio (RER), exercise time to fatigue (ETF) and respiratory aerobic threshold (RAT)
were determined. AN horses presented higher TV and VE, whereas respiratory rate, VO2 and VCO2 were lower at the same velocities.
RER was similar between breeds. ETF was longer in A horses (556.7 ± 66.5 in AN vs. 607.1 ± 71.1 s in A) and no significant
differences were found in RAT (5.50 ± 0.50 in AN vs. 5.86 ± 1.07 m/s in A). In summary, despite the more intense ventilatory
response to exercise at the same velocity, AN horses had lower VO2. The AN horse develops a more intense ventilatory response
to fixed velocities than the A horse and it could be interesting to clarify the role of the locomotion characteristics in
this response. |
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