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Quantification of the energy expenditure during training exercises in Standardbred trotters

Published online by Cambridge University Press:  19 December 2014

J. Fortier ,
G. Deley ,
A.-G. Goachet  and
V. Julliand
J. Fortier*
Affiliation:
URANIE–USC1335 Nutrition du cheval athlète, AgroSup Dijon, 26 bd Dr Petitjean, BP 87999, 21079 Dijon cedex, France
G. Deley
Affiliation:
Centre d’Expertise de la Performance, Faculté des Sciences du Sport, 21000 Dijon, France
A.-G. Goachet
Affiliation:
URANIE–USC1335 Nutrition du cheval athlète, AgroSup Dijon, 26 bd Dr Petitjean, BP 87999, 21079 Dijon cedex, France
V. Julliand
Affiliation:
URANIE–USC1335 Nutrition du cheval athlète, AgroSup Dijon, 26 bd Dr Petitjean, BP 87999, 21079 Dijon cedex, France
*
†E-mail: justine.fortier@gmail.com
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Abstract

An appropriate energy feeding management that ensures the optimal dietary energy supply according to the energy expenditure (EE) is a crucial component for the horse’s performance. The main purpose of this study was to determine the EE during four specific exercises used in the training of Standardbred trotters (promenade, jogging, parcours and interval work-outs). A total of six Standardbred geldings performed four different testing situations on a track. The intensity (expressed in percentage of the maximal velocity over 500 m, i.e. v500) and volume (distance and duration) of the testing situations were determined according to practices reported by French trainers. Promenade and jogging included only an exercise phase, whereas parcours and interval situations also included a warm-up and a recovery phase. Oxygen uptake (VO2), carbon dioxide production (VCO2) and heart rate (HR) were continuously recorded from 2 min before the beginning through to the end of the testing situations, using a portable respiratory gas analyser. Blood lactate levels and rectal temperature were determined before and immediately after the exercise phase of each testing situations. EE of the different phases (warm-up, exercise and recovery) and EE of the entire testing situations (EETOTAL) were calculated from VO2 measurements and the O2 caloric equivalent. Interval and parcours situations induced higher physiological responses than promenade and jogging situations, particularly in terms of VO2peak, VCO2peak and HRpeak. The highest blood lactate concentration (6 mmol/l) was measured after the interval exercise, and respiratory exchange ratios ⩾1 were observed only for the parcours situation. The EE of exercise phase varied from 0.49 to 1.79 kJ/min per kg for promenade and parcours situations. The EE of warm-up and recovery phases did not differ between parcours and interval situations, and was estimated at 1.04 and 0.57 kJ/min per kg BW, respectively. On average, the warm-up and the recovery phases contributed to 38% and 19% of the EETOTAL. For promenade, jogging, parcours and interval situations, EETOTAL was evaluated at 12 618, 11 119, 13 698 and 18 119 kJ, respectively.

Keywords

energy expenditureoxygen uptakework outhorses
Type
Research Article
Information
animal , Volume 9 , Supplement 5 , May 2015 , pp. 793 - 799
Copyright
© The Animal Consortium 2014 

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