Abstract
The effects of four weeks of climbing exercise on erythrocyte monocarboxylate transporter I (MCT I ) content in rats were studied. The erythrocyte MCT1 content was significantly higher in the climbing group than in the sedentary group (p<0.05). Blood lactate concentration was higher (p<0.05), and the relationship between plasma and intra-erythrocyte lactate concentrations was positively correlated in the climbing group (r=0.80, p<0.001). When erythrocytes of the climbing group were separated into young and old ones, young erythrocytes is a tendency to have more MCT1 than old erythrocytes (NS). The increase in erythrocyte MCT1 content by a sustained voluntary climbing exercise may contribute to the rapid lactate delivery to liver and oxidative tissues.
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