Fig. 4

a The serum levels of blood glucose (expressed in mmol/L) at the end of the 6-week weeek exercise or sedentary period. Data are mean ± SEM. Statistical significance: *p < 0.05 relative to the GK sed group at the corresponding time. GK sed sedentary Goto-Kakizaki rats, GK run voluntary wheel-running Goto-Kakizaki rats. b The area under the curve (AUC) for glucose after the oral glucose tolerance test at the end of the 6-week exercise or sedentary period. Data are mean ± SEM. Statistical significance: *p < 0.05 relative to the GK sed group. GK sed sedentary Goto-Kakizaki rats, GK run voluntary wheel-running Goto-Kakizaki rats. c The levels of insulin after the oral glucose tolerance test (expresed in mlU/L) at the end of the 6-week exercise or sedentary period. Data are mean ± SEM. GK sed sedentary Goto-Kakizaki rats, GK run voluntary wheel-running Goto-Kakizaki rats