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Lusitropic function (−dT/dt and TR50%) of sedentary rats (solid symbols) and trained rats (empty symbols) with different myocardial infarction size after swimming exercise training. Lusitropy was evaluated by different extracellular calcium concentrations [(Ca2+)o]. The myocardial infarction size: Sham operated (A,D), Moderate MI (B,E), and Large MI (C,F). Comparisons between sedentary and trained rats: *p < 0.05. Values were expressed by mean ± SD.
