Abstract 4128: Blood Pressure is Reduced Following Both Resistance and Aerobic Training Despite Differential Changes in Arterial Compliance, Vasodilatory Capacity and Autonomic Function
Introduction: The benefits of aerobic exercise (AE) training on blood pressure (BP) are well established, but the effects of resistance exercise (RE) training are less well delineated, and resistance training is not usually recommended for hypertensive patients. The
purpose of this study was to determine the impact of resistance vs aerobic training on BP and arterial stiffness and to elucidate potential mechanisms involved.
Methods: 30 pre or mild hypertensives (20 Males and 10 females) who were not taking any medications were recruited (Age= 48.2±1.3 yrs, Height 171±1.8cm, Weight 88.1±3.8kg, SBP 140±2.4 mmHg, DBP 800±1 mmHg) and were randomly assigned to 4-weeks of resistance (RE) or aerobic (AE) training (15/group). Before and after training we obtained measures of BP, arterial compliance (pulse wave velocity, PWV) heart rate variability (HRV), baroreceptor sensitivity (BRS), and vasodilatory capacity (VC, resistance artery reactive hyperemia).
Conclusions: RE decreased BP despite an increase in arterial stiffness and sympathetic autonomic modulation, while AE decreased BP, arterial stiffness, and sympathetic modulation. Since vasodilatory capacity also increased more with RE than AE, decreases in BP following RE or AE are probably due to different mechanisms. Resistance exercise shows a potential benefit on the microvasculature that is not seen with AE training.