Effect of exercise training on systolic blood pressure. Systolic blood pressure (SBP) was measured in all animals previous to the training period (t0) and at the end of four weeks of exercise training (t4). Rats started the experiment with SBP above 160 mm Hg, indicating the prevalence of high blood pressure. Both exercise intensities reduced SBP significantly (LIG and HIG). The differences in SBP pre (t0) and post training (t4) are indicated with (#) symbol (P < 0.05), and (*) indicates a significant difference in SBP after the exercise period (t0) between CG and trained groups (LIG and HIG) (P < 0.05).