Rossow Lindy M, Fahs Christopher A, Sherk Vanessa D, Seo Dong-Il, Bemben Debra A, Bemben Michael G
Department of Health and Exercise Science, University of Oklahoma, Norman, USA.
Clin Physiol Funct Imaging. 2011 Nov;31(6):429-34. doi: 10.1111/j.1475-097X.2011.01038.x. Epub 2011 Jul 7.
Blood-flow-restricted (BFR) exercise is an emerging type of exercise that may be particularly beneficial to elderly or special populations. These populations may also benefit from reductions in blood pressure (BP). The effect of BFR exercise on postexercise BP has not been examined; this should first be examined in a young, healthy population as a preliminary investigation.
The main purpose of this study was to determine whether postexercise hypotension (PEH) occurred following low-intensity [20% 1 repetition maximum (1-RM)] BFR resistance exercise. A secondary purpose was to compare this response to both a work-matched low-intensity (20% 1-RM) (LI) and a traditional high-intensity (70% 1-RM) resistance exercise bout (HI).
In a randomized cross-over design, ten normotensive, young (18-35 years) men performed one of the three lower-body resistance exercise bouts (HI, LI or low-intensity BFR) during separate visits to the laboratory. Brachial BP, cardiac ultrasound and calf blood flow measurements were taken prior to and 30 and 60 min following exercise. Repeated measures analysis of variance (3 × 3; condition × time) was performed on all variables.
A significant interaction (P<0·05) was found for brachial systolic blood pressure which decreased following HI only. Significant interactions (P<0·05) were also seen for heart rate, total peripheral resistance and calf vascular resistance.
Postexercise hypotension occurred only following HI. Thus, if one is exercising with the intent of lowering BP, HI resistance exercise may be more useful than low-intensity BFR resistance exercise.
血流限制（BFR）运动是一种新兴的运动类型，可能对老年人或特殊人群特别有益。这些人群也可能从血压（BP）降低中获益。BFR运动对运动后血压的影响尚未得到研究；作为初步调查，应首先在年轻健康人群中进行此项研究。
本研究的主要目的是确定低强度[20% 1次重复最大值（1-RM）]BFR抗阻运动后是否会发生运动后低血压（PEH）。次要目的是将这种反应与工作匹配的低强度（20% 1-RM）（LI）和传统高强度（70% 1-RM）抗阻运动组（HI）进行比较。
在随机交叉设计中，10名血压正常的年轻（18 - 35岁）男性在分别前往实验室时进行三种下肢抗阻运动组（HI、LI或低强度BFR）中的一种。在运动前、运动后30分钟和60分钟测量肱动脉血压、心脏超声和小腿血流量。对所有变量进行重复测量方差分析（3×3；条件×时间）。
发现肱动脉收缩压存在显著交互作用（P<0·05），仅在HI后降低。心率、总外周阻力和小腿血管阻力也存在显著交互作用（P<0·05）。
仅在HI后出现运动后低血压。因此，如果一个人进行运动的目的是降低血压，高强度抗阻运动可能比低强度BFR抗阻运动更有用。
