NDLI: Effects of two field continuous incremental tests on cardiorespiratory responses in Standardbred trotters.

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Effects of two field continuous incremental tests on cardiorespiratory responses in Standardbred trotters.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Fortier, J. Goachet, A. G. Julliand, V. Deley, G.
Description	Country affiliation: France Author Affiliation: Fortier J ( URANIE - USC1335 Nutrition du cheval athlète, AgroSupDijon, Dijon Cedex, France.)
Abstract	In humans, cardiorespiratory responses are widely evaluated from field incremental exercise tests. On the contrary, equine exercise physiology faces a huge lack of oxygen consumption measurements (VO2) in field conditions due to technical concerns. The aim of this study was to test the effects of two incremental continuous field tests on cardiorespiratory responses in Standardbred trotters. The two protocols were realized at trot and ended when horses galloped. The tests started at 4.2 m/s (T1) and 6.4 m/s (T2), with speed increments of 1.4 m/s every 3 min for T1 and 0.8 m/s every 2 min for T2. Velocity (v), heart rate (HR) and gas exchanges were recorded continuously, and blood lactate concentration [La(-)] was measured before and after tests. Values recorded at the end of the tests were considered as peak values. The vpeak values were 10.6 ± 0.3 and 10.7 ± 0.7 m/s for T1 and T2 respectively. Horses reached higher VO2peak (T1: 116.6 ± 11.5 ml/min/kg; T2: 88.9 ± 10.2 ml/min/kg; p < 0.05) and HRpeak (T1: 217 ± 5 bpm; T2: 209 ± 3 bpm; p < 0.05) during T1 compared with T2. T1 was significantly longer than T2 (17.5 ± 1.9 vs. 12.9 ± 1.6 min respectively, p < 0.01), and the number of steps entirely ran tended to be different (T1: 5.6 ± 0.6; T2: 6.2 ± 0.8, p = 0.07). Compared to T2, the design of T1 appeared easier to implement and allowed higher cardiorespiratory responses. The relationship between HR-VO2 obtained through T1 gave a better correlation between the two variables than T2. These findings suggest that T1 might be better than T2 for evaluating cardiorespiratory adaptations to exercise and for estimating aerobic energy expenditure in exercising trotters.
File Format	HTM / HTML
ISSN	09312439
Issue Number	2
Volume Number	99
e-ISSN	14390396
Journal	Journal of Animal Physiology and Animal Nutrition
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2015-04-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physiology Discipline Veterinary Medicine Discipline Nutritional Sciences Heart Rate Physiology Horses Oxygen Physical Conditioning, Animal Respiratory Physiological Phenomena Animals Male Physical Exertion Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Food Animals

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