Cardiovascular Dynamics Laboratory, Exercise Physiology, 161F MACC Annex, Kent State University, Kent, OH 44242, USA.
Appl Physiol Nutr Metab. 2019 Apr;44(4):341-347. doi: 10.1139/apnm-2018-0265. Epub 2018 Sep 11.
Resistance exercise is recommended to increase muscular strength but may also increase pulse wave reflection. The effect of resistance exercise combined with practical blood flow restriction (pBFR) on pulse wave reflection is unknown. The purpose of this study was to evaluate the differences in pulse wave reflection characteristics between bench press with pBFR and traditional high-load bench press in resistance-trained men. Sixteen resistance-trained men participated in the study. Pulse wave reflection characteristics were assessed before and after low-load bench press with pBFR (LL-pBFR), traditional high-load bench press (HL), and a control (CON). A repeated-measures ANOVA was used to evaluate differences in pulse wave reflection characteristics among the conditions across time. There were significant (p ≤ 0.05) interactions for heart rate, augmentation index, augmentation index normalized at 75 bpm, augmentation pressure, time-tension index, and wasted left ventricular energy such that they were increased after LL-pBFR and HL compared with rest and CON, with no differences between LL-pBFR and HL. Aortic pulse pressure (p < 0.001) was elevated only after LL-pBFR compared with rest. In addition, there was a significant (p ≤ 0.05) interaction for aortic diastolic blood pressure (BP) such that it was decreased after LL-pBFR compared with rest and CON but not HL. The subendocardial viability ratio and diastolic pressure-time index were significantly different between LL-pBFR and HL compared with rest and CON. There were no significant interactions for brachial systolic or diastolic BP, aortic systolic BP, or time of the reflected wave. In conclusion, acute bench press resistance exercise significantly altered pulse wave reflection characteristics without differences between LL-pBFR and HL.
抗阻运动被推荐用于增加肌肉力量，但也可能增加脉搏波反射。抗阻运动结合实际血流限制（pBFR）对脉搏波反射的影响尚不清楚。本研究的目的是评估在阻力训练男性中，使用 pBFR 的卧推与传统高负荷卧推对脉搏波反射特征的影响。16 名阻力训练男性参与了研究。在使用 pBFR 的低负荷卧推（LL-pBFR）、传统高负荷卧推（HL）和对照（CON）之前和之后评估脉搏波反射特征。使用重复测量方差分析评估条件之间脉搏波反射特征随时间的差异。心率、增强指数、75bpm 归一化增强指数、增强压、时间张力指数和左心室能量浪费等指标存在显著（p≤0.05）的交互作用，表明与休息和 CON 相比，LL-pBFR 和 HL 后这些指标增加，LL-pBFR 和 HL 之间没有差异。与休息相比，仅在进行 LL-pBFR 后主动脉脉搏压（p<0.001）升高。此外，主动脉舒张压（BP）存在显著（p≤0.05）交互作用，表明与休息和 CON 相比，LL-pBFR 后主动脉舒张压降低，但与 HL 无差异。与休息和 CON 相比，LL-pBFR 和 HL 与 LL-pBFR 和 HL 相比，心内膜下活力比和舒张期压力时间指数存在显著差异。肱动脉收缩压或舒张压、主动脉收缩压或反射波时间无显著交互作用。结论：急性卧推抗阻运动显著改变了脉搏波反射特征，但 LL-pBFR 和 HL 之间没有差异。
