Aerobic arm-crank exercise training for 12 weeks in sedentary men increased left ventricular wall thickness from 0.86 to 0.99 cm (P<0.05) with no change in chamber dimension.
Does 12 weeks of aerobic arm-crank exercise training change left ventricular structure and function in previously sedentary men?
Upper body aerobic exercise training in sedentary men induces concentric left ventricular adaptation characterized by increased wall thickness without chamber dilation.
p-value: p=<0.05
Upper body exercise has many applications to the rehabilitation and maintenance of cardiovascular health of individuals who are unable to exercise their lower body. The hemodynamic loads of upper body aerobic exercise are characterized by relatively high blood pressure and relatively low venous return. It is not clear how the left ventricle adapts to the specific hemodynamic loads associated with this form of exercise training. The purpose of this study was to measure left ventricular structure and function in previously sedentary men by using echocardiography before and after 12 wk of aerobic arm-crank exercise training (n = 22) or a time control period (n = 22). Arm-crank peak oxygen consumption (in ml x kg(-1) x min(-1)) increased by 16% (P < 0.05) after training, and significant differences (P < 0.05) were found in wall thickness (from 0.86 to 0.99 cm) but not in left ventricular internal dimension in diastole or systole. This suggested a concentric pattern of left ventricular hypertrophy that persisted after scaling to changes in anthropometric characteristics. No differences (P < 0.05) were found for any measurements of resting left ventricular function. We conclude that upper body aerobic exercise training results in a specific left ventricular adaptation that is characterized by increased left ventricular wall thickness but no change in chamber dimension.
Gates et al. (Sat,) conducted a other in Sedentary (n=44). Aerobic arm-crank exercise training vs. Time control period was evaluated on Left ventricular wall thickness (p=<0.05). Aerobic arm-crank exercise training for 12 weeks in sedentary men increased left ventricular wall thickness from 0.86 to 0.99 cm (P<0.05) with no change in chamber dimension.