The energy requirements of racehorses in training
| Autor: | Meriel Moore-Colyer, Mark Ebert |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Feed consumption
Energy balance Non Ruminant Nutrition racehorse Energy requirement maintenance Animal science Heart rate medicine 0501 psychology and cognitive sciences 050102 behavioral science & comparative psychology equine training General Veterinary business.industry 05 social sciences 0402 animal and dairy science Training (meteorology) 04 agricultural and veterinary sciences nutrition model energy balance 040201 dairy & animal science Energy expenditure Energy cost AcademicSubjects/SCI00960 Animal Science and Zoology medicine.symptom business Weight gain |
| Zdroj: | Translational Animal Science |
| ISSN: | 2573-2102 |
| DOI: | 10.1093/tas/txaa196 |
| Popis: | The aim of this study was to estimate the energy requirements of Thoroughbred racehorses in active training for flat racing. Twenty-two Thoroughbred racehorses in England were measured over periods from 6 to 15 wk, which included periods of active race training and temporarily reduced training. Energy intake was determined by measuring daily feed consumption. Energy output was measured using heart rate monitors during 730 training sessions, relating heart rate (HR) to oxygen consumption (VO2) and converting VO2 to energy. Field maintenance requirements were calculated by deducting the marginal energy cost of training from energy input. The mean field maintenance expenditure during periods of active race training was 0.1731 megajoules (MJ) of metabolizable energy (ME)/kg of bodyweight (BW)/d (SD = 0.0174, CI = 0.0073, n = 22 horses, 193 wk). This result is 11% to 66% greater than the official guidance found in the United States, France, Germany, and the Netherlands. Heart rate monitoring revealed a mean energy expenditure for exercise of 0.0212 MJ ME/d (SD = 0.0049, CI = 0.0007, n = 22 horses) for racehorses in active race training, a result 70% to 82% below the official guidance. The total mean energy expenditure for racehorses in active race training was 0.1943 MJ ME/kg/d (SD = 0.0177, CI = 0.0078, n = 20 horses 193 wk), 4% to 22% less than the official guidance. Horses actively racing had a 12% higher maintenance requirement than those in training but not yet racing (P = 0.01). The 2- and 3-yr-old horses did not gain weight during active race training, but grew slowly during breaks in training. This study explores the factors affecting energy balance in racehorses, and provides updated findings for their maintenance and training requirements. |
| Databáze: | OpenAIRE |
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