| Objective:To examine the changes of heart rate variability (HRV),blood pressure (BP) and heart rate (HR),and subjective responses under two-grade resistive exercises at sitting and supine positions in healthy adults.Methods:Twenty participants were recruited to carry out a different position and two intermittent elastic resistive exercise training at random.HRV,systolic BP (SBP),diastolic BP (DBP),HR,rating perceived exertion (RPE) and anxiety level were recorded during the tasks and resting periods.Results:There was significant difference in HR,LF/HF ratio,HFms2,LFn.u. and HFn.u. between two postures (P<0.01).Moreover,significant interactions between postures and graded resistive exercises of the same variables were observed (P<0.01).There was statistically significant difference in HR between two grades of resistance exercises in supine (P<0.01).There was significant difference in HR between two grades of resistance training in supine (P<0.01).Conclusions:These results suggested that different postures have an influence on the cardiovascular responses.The parameters of objective measurements are more sensitive to assess cardiovascular changes than subjective responses. |
