RESUMOObjetivou-se com esse estudo avaliar o percentual de perdas de peso sofridas por cavalos submetidos a provas de enduro de 20, 40, 80 e 160 km de distância sob clima tropical na região central do Brasil (Brasília-DF). Os animais foram pesados antes, durante e após as provas com a utilização de uma balança portátil. Observou-se percentuais de perdas de peso de 3,47±1,86%, 5,93±4,35%; 4,69±2,01% e 4,53±2,11%, nas provas de 20, 40, 80 e 160 Km, respectivamente. Tais valores foram significativamente maiores ao final da primeira etapa das provas quando comparados com o peso antes das provas, no repouso revelando importante redução de perdas na continuidade das provas, provavelmente devido ao melhor condicionamento dos animais além do livre acesso a água e feno durante os períodos obrigatórios de descanso. A utilização de balanças portáteis deve ser estimulada em provas equestres de longa duração, como uma ferramenta de monitoramento de perdas de peso imperceptíveis por veterinários durante as competições. Os resultados obtidos revelaram que mesmo animais treinados e condicionados a beber água e se alimentar durante esforços prolongados estão sujeitos a importantes perdas de peso. PALAVRAS-CHAVE:Clima. Desidratação. Balança. Equinos. SUMMARYThe purpose of this study was to evaluate the percentage of body weight loss suffered from horses submitted to endurance rides of 20, 40, 80 and 160 Km distance under tropical climate in West Center of Brazil (Brasilia-DF). Horses were weighted before, during and after the competition, with a portable scale. It was noticed percentual body weight losses of 3,47±1,86%, 5,93±4,35%; 4,69±2,01% and 4,53±2,11%, in 20, 40, 80 and 160 Km rides, respectively. These values were higher in the first weighting point, compared to basal values, with an important reduction throughout subsequent rings of rides, probably due to a better animal condition and free intake of water and forage, during the mandatory rest periods. The use of portable scales should be used for prolonged rides as a tool for veterinarians to monitor insensible body weight losses of horses in this kind of exercise. Data also revealed that even trained horses are susceptible to important body weight losses.
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