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See detailTraining-Induced Modifications in Cardiorespiratory and Ventilatory Measurements in Thoroughbred Horses
Art, Tatiana ULg; Lekeux, Pierre ULg

in Equine Veterinary Journal (1993), 25(6), 532-536

The effects of training and detraining on ventilation during a standardised exercise test were investigated. Ten healthy Thoroughbred horses underwent 5 standardised treadmill exercise tests (SET): SET1 ... [more ▼]

The effects of training and detraining on ventilation during a standardised exercise test were investigated. Ten healthy Thoroughbred horses underwent 5 standardised treadmill exercise tests (SET): SET1, at the start of the experimental period; SET2, after 3 weeks acclimatisation; SET3, after 3 week of aerobic training; SET4 after 3 weeks of anaerobic (i.e. interval) training; and SET5, after 3 weeks of detraining. The SETs were carried out in an air-conditioned laboratory on a treadmill inclined at 6 degrees. Respiratory airflow, tidal volume (VT), respiratory frequency (RF) and expired minute volume (VE) were obtained using a face mask and 2 ultrasonic pneumotachographs. Peak oxygen uptake (VO2 peak) and carbon dioxide production (VCO2 peak) values were calculated on a breath-by-breath basis, using a mass spectrometer. Heart rate (HR) was continuously measured with a polar horse tester. Oxygen pulse (VO2/HR) and ventilatory equivalent for O2 were calculated from the collected data. Venous blood was sampled before and after the SET for lactate, pH and haemoglobin determinations. The results indicated that trained horses showed significant modifications of all values, except VT, RF and VE. This study suggests that, in horses, the increase in VO2 induced by training seems to be mainly due to cardiovascular and haematological changes rather than to ventilatory changes. Consequently, while all the other systems implicated in exercise physiology can be efficiently improved and trained, the ventilatory capacity has only limited ability to adapt to training [less ▲]

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See detailAérosolthérapie chez le cheval : 3. Etude clinique
Lekeux, Pierre ULg; Genicot, Bruno; Votion, Dominique ULg et al

in Pratique Vétérinaire Equine (1993), 25(4), 245-248

This review analyzes the advantages, disadvantages, limites and clinical applications of aerosoltherapy in equine medicine

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See detailAérosolthérapie chez le cheval : 1. Etude technique
Lekeux, Pierre ULg; Genicot, Bruno; Votion, Dominique ULg et al

in Pratique Vétérinaire Equine (1993), 25(4), 225-232

This review describes the principle of action of the different types of nebulizers in the horse and analyzes the technical and methodological requirements for an optimal use of aerosoltherapy in this ... [more ▼]

This review describes the principle of action of the different types of nebulizers in the horse and analyzes the technical and methodological requirements for an optimal use of aerosoltherapy in this species [less ▲]

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See detailMechanics of breathing in resting and exercising animals
Lekeux, Pierre ULg; Art, Tatiana ULg

in Lekeux, Pierre (Ed.) Pulmonary Function in Healthy, Exercising and Diseased Animals (1993)

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See detailGas exchange in resting and exercising animals
Lekeux, Pierre ULg; Art, Tatiana ULg

in Lekeux, Pierre (Ed.) Pulmonary Function in Healthy, Exercising and Diseased Animals (1993)

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See detailControl of breathing in resting and exercising animals
Lekeux, Pierre ULg; Rollin, Frédéric ULg; Art, Tatiana ULg

in Lekeux, Pierre (Ed.) Pulmonary Function in Healthy, Exercising and Diseased Animals (1993)

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See detailFunctional effects of obstructive pulmonary diseases
Lekeux, Pierre ULg; Clercx, Cécile ULg; Art, Tatiana ULg

in Lekeux, Pierre (Ed.) Pulmonary Function in Healthy, Exercising and Diseased Animals (1993)

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See detailFunctional effects of vascular pulmonary diseases
Lekeux, Pierre ULg; Clercx, Cécile ULg; Art, Tatiana ULg

in Lekeux, Pierre (Ed.) Pulmonary Function in Healthy, Exercising and Diseased Animals (1993)

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See detailEffect of exercise on equine alveolar ventilation
Lekeux, Pierre ULg; Art, Tatiana ULg; Desmecht, Daniel ULg

in Proceedings of the Eleventh Veterinary Respiratory Symposium, Champaign, Illinois (1992, September 27)

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See detailInfluence of training on ventilatory and cardio-respiratory parameters measured during a standardised exercise in thoroughbred horses
Art, Tatiana ULg; Votion, Dominique ULg; Mc Entee, K et al

in Proceedings of the 11th Comparative Respiratory Society Meeting (1992)

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See detailTraining-induced changes in cardio-respiratory parameters during a standardised exercise in thoroughbred horses
Art, Tatiana ULg; Votion, Dominique ULg; Mc Entee, K et al

in Archives Internationales de Physiologie et de Biochimie (1992)

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See detailQuantitative Buffy Coat Analysis Related to Adrenocortical Function in Horses During a Three-Day Event Competition
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Zentralblatt für Veterinarmedizin. Reihe A (1991), 38(5), 376-82

This study was carried out to investigate stress induced in a cross-country by measuring plasma cortisol and to compare the changes in cortisol level with the leucocytic changes measured with the ... [more ▼]

This study was carried out to investigate stress induced in a cross-country by measuring plasma cortisol and to compare the changes in cortisol level with the leucocytic changes measured with the quantitative buffy coat (QBC) analysis, which is a new method applicable in field conditions for the evaluation of haematological parameters in horses. Seven healthy horses competing in a national three-day event were investigated. Venous blood was sampled under resting condition, 2 min and 180 min after the completion of the cross-country and analysed for haematological parameters, plasma cortisol, protein and lactate levels. Immediately after the event, there was a significant increase in all values except in the granulocytes (Gr) to lymphocytes-monocytes (LM) ratio. 180 min after the event, all the parameters returned to their resting levels while white blood cells (WBC), Gr and Gr/LM ratio were significantly higher with respect to their resting values. A high correlation (r = 0.82) was found between the relative increase in plasma cortisol levels 2 min after exercise and the relative increase in Gr/LM 180 min after exercise. Therefore it was concluded that the Gr/LM ratio measured 180 min after exercise with the QBC analysis is a reliable index to estimate the plasma cortisol levels measured 2 min after exercise. This new technique could consequently be used in order to evaluate, in field conditions, the exercise-induced stress. [less ▲]

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See detailPotentialités de l'application de l'oxymétrie à infra-rouge basée sur la pulsation dans l'espèce canine
Lemaire, M.; Art, Tatiana ULg; Henroteaux, Marc ULg et al

in Annales de Médecine Vétérinaire (1991), 135

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See detailEtude de la mécanique ventilatoire en tant que facteur limitant de la ventilation au cours de l'effort chez les équidés
Art, Tatiana ULg

Thèse d’agrégation de l’enseignement supérieur (1991)

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See detailEffect of 5 different types of exercise, transportation and ACTH administration on plasma cortisol concentration in sports horses.
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Persson, S. G. B.; Jeffcott, L. B.; Lindholm, A. (Eds.) Equine Exercise Physiology III (1991)

This study was carried out to compare the changes in plasma cortisol concentration produced by 5 different types of exercise, transportation and ACTH administration. Venous blood was analysed for cortisol ... [more ▼]

This study was carried out to compare the changes in plasma cortisol concentration produced by 5 different types of exercise, transportation and ACTH administration. Venous blood was analysed for cortisol concentration before and after each stimulus. The types of exercise were show jumping (n=28), cross country phase of a three-day event (n=32), trot race (n=9), gallop race (n = 10) and endurance ride (n=8). The response following the intravenous injection of synthetic ACTH (200 µg) in 6 of the event horses was determined. The ACTH test was carried out one week after competition. In 5 horses, the response to road transport of one hour was studied. All stimuli, except transportation produced a significant increase in plasma cortisol concentration. The endurance ride produced the largest increase and the show jumping the smallest. ACTH administration resulted in a 164% rire in plasma cortisol. Il was concluded that I) the degree of increase in plasma cortisol concentration appeared to reflect both intensity and dotation of workload; endurance ride appeared to be the most exhaustive and show jumping the least; 2) there was a correlation (r2=0.82) between the individual cortisol response to cross country exercise and to exogenous ACTH in the saure horses and 3) there was an important individual effect on transport-induced cortisol changes. [less ▲]

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See detailChanges in leucocyte counts related to adrenocortical function in horses during exercise
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

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See detailComparison of the effects of a physiological and a pharmacological stress on plasma cortisol in sport horses
Linden, Annick ULg; Art, Tatiana ULg; Amory, Hélène ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

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See detailExercise physiology in jumping horses
Art, Tatiana ULg; Amory, Hélène ULg; Desmecht, Daniel ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

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See detailEvaluation of the exercise performed by horses during the country phase of a three-day events competition : a field study
Amory, Hélène ULg; Linden, Annick ULg; Art, Tatiana ULg et al

in Archives Internationales de Physiologie et de Biochimie (1991)

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See detailHeart rate, hematological and serum biochemical responses to show jumping
Lekeux, Pierre ULg; Art, Tatiana ULg; Linden, Annick ULg et al

in Persson, S. G. B.; Lindholm, A.; Jeffcott, L. B. (Eds.) Equine Exercise Physiology III (1991)

Changes in heart rate (HR), plasma lactate (LA) and some other blood parameters were studied in 16 healthy show jumping horses participating in the Belgian Junior Championship. Venous blond was collected ... [more ▼]

Changes in heart rate (HR), plasma lactate (LA) and some other blood parameters were studied in 16 healthy show jumping horses participating in the Belgian Junior Championship. Venous blond was collected from each horse before and immediately after competing and was analysed for packed cell volume (PCV), LA, plasma cortisol, blood glucose (GLU), total plasma protein bicarbonate ions and serum levels of lactate dehydrogenase, creatine kinase, aspartate aminotransferase and gamma glutamyl transferase (GGT). A HR recorder placed under the saddle continuously recorded HR from the warm-up tu 5 min after the course in 10 horses. Show jumping induced a significant increase in all parameters, except GLU, which decreased significantly, and GGT which remained unchanged. Resting values of LA and HR were 0.43±0.05 mmol I-1 and 44.7±2.9 beau min-1 respectively. Post-exercise LA reached a mean value of 8.7±0.5 mmol I-1, while HR rose to a peak of 189.2±3.5 beau min-1 during Ihe course. The results of the present study demonstrated that, although the speed and duration of such an exercise are low, show jumping represents severe exertion which requires some anaerobic metabolism. [less ▲]

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