EFFECT OF NON-EXHAUSTIVE INDIVIDUALIZED AEROBIC PHYSICAL TRAINING IN CARDIORESPIRATORY FITNESS AND AUTONOMIC CARDIAC MODULATION IN HYPERTENSIVE ADULTS

摘要

Background: Low cardiorespiratory fitness and autonomic dysfunction have been demonstrated in hypertensive patients. There is a lack of individualized exercise programs based on a non-exhaustive double effort (NEDE) protocol. Objective: To evaluate the effect of individualized aerobic training with intensity determined by a NEDE protocol on cardiorespiratory fitness and autonomic modulation of heart rate (HR) in hypertensive outpatients. Methods: Controlled, non-randomized study with 61 participants distributed into intervention (IG) and control (CG) groups. IG was submitted to 12-week training with intensity determined by NEDE. Cardiopulmonary exercise testing and HRV evaluation were assessed pre and post intervention, symbolic analysis of HRV was used; iR-R time series were classified into patterns without (0V) and with one (1V) variation (sympathetic modulation); with two similar (2SV) and different (2DV) variations (parasympathetic modulation). Results: Significant differences in IG over CG were found regarding test duration, distance, VO2peak, METpeak, peak exercise velocity, ergometer slope, PuO2 and HRpeak ((all p's<0.05)). IG showed increased distance (diff=0.1; p=0.0009), decreased test duration (diff=-1.8; p<0.0001), increased peak velocity (diff=0.5; p=0.007) compared to CG. After 12 weeks, there were observed decreases in 0V% (p<0.0001) and increases in the 2DV% (p<0.0001) in the IG which were different to the comparison group (p<0.004). Conclusion: The intervention improved cardiorespiratory fitness and autonomic modulation of HR. Further studies are needed to assess maintenance of exercise behavior in trained patients.