Figure 1
Effect of intense exercise training on myocardial basal function and responsiveness to isoproterenol stimulation. Isoproterenol was infused to isolated hearts of sedentary control (n = 13), trained control (n = 7), sedentary diabetic (n = 11) and trained diabetic (n = 7) rats in ascending concentrations ranging from 1.10-8 to 1.10-5 M. In trained control rats, 1.10-6 and 1.10-5 M isoproterenol doses were not tested for technical reason. Data are presented as mean ± SEM. *= significantly different from sedentary controls (p <0.05), † = significantly different from trained controls (p <0.05), ‡ = significantly different from sedentary diabetics (p <0.05).