3.a. Sample size calculation: To perform the sample calculation, previously published data wich showed platelet agreeability average of 32.9 ± 16 P2Y12 reactions units (PRU) in post-AMI patients on ticagrelor was utilizes. For an expected 35% decrease in platelet aggregability at trained group, and taking into account power of 80% and alpha index of 0.05, including 31 patients in each group is required. Admitting a percentage of losses of 40% given the difficulties inherent in the assessment of the sympathetic activity and adherence to the training program, the initial plan contemplates the inclusion of 90 patients in the study (45 in each group).