摘要：Moreira DN, Peçanha T, Guerra ZF, Silva LP, Nakamura FY, Laterza, MC, Lima JRP. Effects of Aerobic Fitness on Cardiac Autonomic Modulation during Supine and Upright Posture. JEPonline 2013;16(4):92-100. The purpose of this study was to assess the influence of aerobic fitness on cardiac autonomic modulation in sedentary subjects in the supine and upright posture. Twenty-four young men (22 ± 2.5 yrs) were assessed for aerobic fitness, including supine and upright posture heart rate and heart rate variability analysis. From the maximal exercise test VO2 max values, the subjects were divided into two groups: Low VO2 max (n=13) and High VO2 max (n=11). Student’s t-test was performed to compare the autonomic variables between the groups (P<0.05). We observed higher values of HFnu and LFnu during the supine posture and greater responses of the same ratios during the upright posture in the High VO2 max group compared to the Low VO2 max group. The results of this study indicate that higher aerobic fitness promotes positive cardiac autonomic responses, both during supine and upright posture.
