Hemodinâmica periférica e central de praticantes de treinamento resistido ou aeróbico

Abstract

Objectives: We sought to compare the central hemodynamics between intense resistance-trained subjects and endurance runners. Applanation tonometry of radial artery, pulse wave velocity and echocardiographic measurements were performed in 19 intense resistance-trained subjects, 21 endurance runners and 29 healthy untrained controls, all male and matched by age (25 to 50 years). One way ANOVA or Kruskal Wallis was used for data analysis, followed by Tukey or Dunn post hoc test respectively. Data are expressed as mean ± standard deviation (median). Results: Augmentation index adjusted by 75 beats per minute (AIX@75%) was lower in intense resistance-trained subjects than in endurance runners and controls respectively [-10.8 ± 10.0 (-15.0) vs -0.6 ± 13.2 (-1.0) vs 1.2 ± 12.9 (1.0), (P<0.001)]. Endurance runners in turn presented higher subendocardial viability ratio (SEVR%) [225 ± 32 (223)] vs [186 ± 35 (185)] in intense resistance-trained and [173 ± 27 (174)] in healthy untrained subjects, (P<0.001). Furthermore, endurance runners showed lower ejection duration index (ED%) [28 ± 3 (27)] vs [32 ± 4 (31)] in intense resistance-trained and [33 ± 3 (33)] in healthy untrained subjects, (P<0.001). Pulse wave velocity was similar among groups (P =0,08) whereas both trained groups presented larger left ventricular mass in g.m-2, (P<0.001). Intense resistance-trained subjects showed better dampening of pressure waves whereas endurance runners presented better myocardial perfusion and more efficient left ventricular contraction