| Keywords |
Mean arterial pressure ; Metaboreflex ; Post exercise muscular ischemia ; Total vascular conductance |
| Abstract |
The purpose of this study was to investigate whether aerobic exercise training improves the muscle metaboreflex in obese women. Eight obese women were recruited in this study. Subjects performed 3 min static handgrip exercise and 2 min of post exercise muscular ischemia (PEMI) while heart rate (HR), stroke volume (SV), systolic blood pressure (SBP), and diastolic blood pressure (DBP) were measured followed by the calculation of cardiac output, mean arterial pressure (MAP), and total vascular conductance (TVC). All subjects completed 12 wk aerobic exercise training consisting of 3 times/wk and 40 min per session. Subjects walked/ran at the exercise intensity of 50% maximum heart rate on the treadmill. In order to maintain the target heart rate, the speed and grade were manipulated every two weeks. With aerobic exercise training, SBP, DBP and MAP were significantly decreased during static exercise, while TVC was significantly increased. Both SBP and MAP responses mediated by the muscle metaboreflex were significantly decreased. These results indicate that aerobic exercise training altered the strength of the muscle metaboreflex. Thus, regular aerobic exercise training may improve impaired peripheral vasoconstriction and exaggerated blood pressure response induced by the muscle metaboreflex in obese women. |