Limiar anaeróbico (V4) e frequência cardíaca de cavalos Crioulos condicionados para prova funcional / Anaerobic threshold (V4) and heart rate of Crioulo horses conditioned for functional testing

RESUMO

Determinou-se o limiar anaeróbico (V4) de 23 cavalos Crioulos hígidos em treinamento. Os animais selecionados foram submetidos a testes de desempenho, composto por três etapas de velocidade progressiva de 6m/s, 8m/s e 10m/s, com duração de cinco minutos cada etapa, até que fosse atingida a concentração de 4mmol/dL de lactato sanguíneo. As concentrações de lactato sanguíneo elevaram-se a partir da velocidade de exercício de 6,0m/s, sendo que 20 animais (90%) atingiram 4mmol/L de lactato na velocidade entre 6 - 8m/s, com média de frequência cardíaca que variou de 121 a 140bpm. Concluiu-se que a V4 do cavalo Crioulo está entre as velocidades de 6 - 8m/s e a frequência cardíaca entre 121 - 140bpm.

ABSTRACT

The anaerobic threshold (V4) while running on a track is used in many breeds to evaluate physical conditioning and to establish a training regimen, but these data have not been obtained for the Crioulo breed. This study evaluated 23 healthy Crioulo horses to determine the anaerobic threshold (V4) during training. The selected animals were subjected to a performance test on a track. The test consisted of three five minute stages with increasing speeds of 6m/s, 8 m/s and 10m/s until the blood lactate concentration reached 4mmol/dL. Blood lactate concentrations began to increase at the exercise speed of 6m/s, and 90% (n=20) of the animals reached 4mmol/dL lactate between 6-8m/s, with an average heart rate ranging from 121 to 140bpm at these speeds. Our results demonstrate that the V4 of the Crioulo horse is between 6-8m/s at a heart rate between 121 and 140bpm.