4. Discussion
ischemia, CAD, chronic coronary syndromes
ISCHEMIA, DILATION, CAD, CARDIOVASCULAR DISEASES
Considering the results of the current study, the proposed cardiac rehabilitation programme with the additionally implemented NW training and regular rehabilitation intervention, not including this form of training, led to an increase of intense PA, aerobic efficiency and quality of life. It also had a positive effect on the modification of selected biochemical pro-atherosclerotic blood markers. The observed beneficial changes in the group of patients with CCS after PCI were noted both immediately after rehabilitation and in the follow-up period. The effects of the discussed changes were more visible in the cardiac rehabilitation programme with the additionally implemented NW training.Regular PA is prophylactic in cardiovascular diseases and, independently of other factors, reduces the likelihood of CAD. The beneficial effect of PA is directly reflected in the improvement of vascular endothelial function, as well as the prothrombotic state, lipid profile, proinflammatory state and arterial pressure [The recently published trial ISCHEMIA, which analysed the impact of revascularization in patients with chronic coronary syndromes, demonstrated that invasive management did not lower all-cause mortality at 4 years in any ischemia or CAD subgroup [The research method used in our project, combining the assessment of PA based on the above-mentioned parameters, using a Polar M200 wrist heart rate monitor in patients after PCI, seems to be an innovative approach, as there is no similar information in the analysed literature. Another important issue presented in the study by Peterson et al. [From the current analysis, it was found that in the experimental group of patients, the VO2peak value [L/min], in global terms, was significantly higher immediately after rehabilitation and 4 months following its completion, compared to the baseline value. Even a small increase in VO2peak after rehabilitation increases the exercise capacity of the patients form the experimental group and improves the risk profile of CAD [In light of our research, only among patients from the experimental group, after the period of rehabilitation and after 2 months from its completion, improvement was noted in FMD, compared to the control group. In our opinion, the main reason for the improvement of endothelial function, estimated as the dilation of the brachial artery in this group of patients, was the activation of larger muscle groups, which could be directly related.Among the important indicators of frequency analysis, the power component of the low- (LF) and high-frequency spectrum (HF) deserve attention. Sympathetic activation associated with an increase in the LF amplitude is observed in stressful situations or recent MI, in contrast to the increase of the HF component occurring in the case of increased vagal tone [General questionnaires most fully define the concept of HRQOL by measuring the quality of life in a comprehensive manner and in a wide range [