Background Debates exist about the preference for single-or multiple-set resistance exercise(RE)on achieving similar training outcome,however,no study examined their effects on the heart,thus,this study was to examine...Background Debates exist about the preference for single-or multiple-set resistance exercise(RE)on achieving similar training outcome,however,no study examined their effects on the heart,thus,this study was to examine the effect of volume-matched single-and multiple-set RE on the myocardial response through examining rate pressure product(RPP).Methods Fourteen healthy untrained college students performed two leg press exercises(4×10 and 1×40 at 150%body mass)on different days,and each was performed twice in a counterbalanced crossover order.Pre-and post-exercise SBP and HR were measured by auscultatory method,RPP was calculated as SBP×HR×10^(-3),RPP difference(RPPdiff)was calcu-lated by post-exercise RPP subtracting pre-exercise RPP.Results Single-set post-exercise RPP(17.48±3.16 mmHg·beats/min),HR(123.86±20.25 beats/min)was significantly greater than multiple-set post-exercise RPP(13.66±3.04 mmHg·beats/min),HR(101.61±19.14 beats/min),respec-tively.There was no significant difference of SBP(141.07±9.37 vs.134.29±15.16 mmHg)between exercise protocols(P=0.13).The RPPdiff of single-set(6.74±2.86 mmHg·beats/min)was significantly greater than that of multiple-set(3.62±2.90 mmHg·beats/min)(P<0.001).Conclusions Single-set RE exerts a greater myocardial oxygenation response as compared to multiple-set,HR contributed more than SBP to the increase of RPP in RE.The results indicate that single-set RE can be warranted when wanting to train the heart,while multiple-set RE would appear best for those who should avoid heart stress.展开更多
Objective: To observe the clinical efficacy of puerarin in treating patients with unstable angina (UA). Methods: Frequency of angina occurrences, consumed doses of nitrates, heart rate (HR), blood pressure, rest elec...Objective: To observe the clinical efficacy of puerarin in treating patients with unstable angina (UA). Methods: Frequency of angina occurrences, consumed doses of nitrates, heart rate (HR), blood pressure, rest electrocardiogram (ECG) and myocardial oxygen consumption were observed before and after drug therapy in puerarin group (21 cases) and control group (18 cases) respectively. Results: The effect in the puerarin group not only showed to be better than that in the control group in reducing frequency of angina occurrence and consumed doses of nitrates, and improving abnormal rest ECG, but also appeared to be preferable to the control group in reducing myocardial oxygen consumption and increasing exercise duration ( P <0.05). Conclusion: Puerarin is a safe and effective drug in treating patients with UA.展开更多
文摘Background Debates exist about the preference for single-or multiple-set resistance exercise(RE)on achieving similar training outcome,however,no study examined their effects on the heart,thus,this study was to examine the effect of volume-matched single-and multiple-set RE on the myocardial response through examining rate pressure product(RPP).Methods Fourteen healthy untrained college students performed two leg press exercises(4×10 and 1×40 at 150%body mass)on different days,and each was performed twice in a counterbalanced crossover order.Pre-and post-exercise SBP and HR were measured by auscultatory method,RPP was calculated as SBP×HR×10^(-3),RPP difference(RPPdiff)was calcu-lated by post-exercise RPP subtracting pre-exercise RPP.Results Single-set post-exercise RPP(17.48±3.16 mmHg·beats/min),HR(123.86±20.25 beats/min)was significantly greater than multiple-set post-exercise RPP(13.66±3.04 mmHg·beats/min),HR(101.61±19.14 beats/min),respec-tively.There was no significant difference of SBP(141.07±9.37 vs.134.29±15.16 mmHg)between exercise protocols(P=0.13).The RPPdiff of single-set(6.74±2.86 mmHg·beats/min)was significantly greater than that of multiple-set(3.62±2.90 mmHg·beats/min)(P<0.001).Conclusions Single-set RE exerts a greater myocardial oxygenation response as compared to multiple-set,HR contributed more than SBP to the increase of RPP in RE.The results indicate that single-set RE can be warranted when wanting to train the heart,while multiple-set RE would appear best for those who should avoid heart stress.
文摘Objective: To observe the clinical efficacy of puerarin in treating patients with unstable angina (UA). Methods: Frequency of angina occurrences, consumed doses of nitrates, heart rate (HR), blood pressure, rest electrocardiogram (ECG) and myocardial oxygen consumption were observed before and after drug therapy in puerarin group (21 cases) and control group (18 cases) respectively. Results: The effect in the puerarin group not only showed to be better than that in the control group in reducing frequency of angina occurrence and consumed doses of nitrates, and improving abnormal rest ECG, but also appeared to be preferable to the control group in reducing myocardial oxygen consumption and increasing exercise duration ( P <0.05). Conclusion: Puerarin is a safe and effective drug in treating patients with UA.
