engleski

Lactate concentration changes during treadmill exercise in cats

Lactate is an indicator of glycolytic activity in skeletal muscles. The degree of lactate increase during exercise is related to the intensity of activity, as well as to the stress caused by exercise. Sixteen untrained Maine Coon cats, mean age (± SD) 4.0 (± 2.4) years, mean body mass (±SD) 6.4 (± 2.0) kg, participated in the study. For testing purposes, a VEF-Fe protocol was used ; it included the initial speed of 0.6 km/h, increased by 0.2 km/h each minute of test duration. It was considered that the cat reached maximum exhaustion when open-mouth panting started and/or the cat showed signs of uncoordinated gait. The average (±SD) duration of the exercise was 7.8 (± 2.9) min, in which the cats covered an average distance of 0.2 (±0.1) km. The average maximum speed was 2.0 (±0.6) km/h. Blood lactate concentration was determined by a portable Scout analyser (LS, SensLab GmbH, Germany) at 5 measuring points: prior to the exercise, immediately after exercise and 15, 30 and 60 minutes after the exercise. The mean (± SD) concentration prior to the exercise was 1.41 (± 0.67) mmol/L ; immediately after the exercise 1.53 (± 0.68) mmol/L ; 15 minutes after the exercise 1.25 (± 0.74) mmol/L ; 30 minutes after the exercise 0.78 (± 0.36) mmol/L and 60 minutes after the exercise 0.78 (± 0.25) mmol/L. There was a statistically significant (p<0.05) difference between lactate concentrations measured both prior to and after the exercise, compared to 30 and 60 minutes after the exercise. The results of this study indicate that in untrained cats the stress related to either exercise anticipation or exercise itself can result in an increased level of lactate concentration. Further studies in trained cats are necessary to determine the sole effect of exercise on lactate levels.

lactate, exercise, cat

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