ACUTE NEUROMUSCULAR ADAPTATIONS IN RESPONSE TO LOW-INTENSITY BLOOD-FLOW RESTRICTED EXERCISE AND HIGH-INTENSITY RESISTANCE EXERCISE: ARE THERE ANY DIFFERENCES?
ACUTE NEUROMUSCULAR ADAPTATIONS IN RESPONSE TO LOW-INTENSITY BLOOD-FLOW RESTRICTED EXERCISE AND HIGH-INTENSITY RESISTANCE EXERCISE: ARE THERE ANY DIFFERENCES?
复制标题
DOI：
10.1519/jsc.0000000000002022
复制
发表时间：
2018-04-01
影响因子：
3.2
通讯作者：
Mil-Homens, Pedro
中科院分区：
文献类型：
--
作者：
Fatela, Pedro;Reis, Joana F.;Mil-Homens, Pedro
大量研究报道了低强度（LI）血流量限制运动（BFRE）和高强度（HI）阻力训练之间相似的神经肌肉适应性。不幸的是，这些实验都没有针对每个参与者的血流限制（BFR）水平进行个体化设计。因此，他们的发现很难解释。我们的目的是比较LI BFR（绝对血管闭塞压的80%）与LI非BFR和HI训练对肌肉扭矩、激活和神经肌肉疲劳的急性影响。10名男性（23.8 - 6岁，5.4岁）在有或没有BFR （LI）的情况下，以20%和75%的最大重复次数进行锻炼。静息血流量测量分别测定血流量限制压。在运动前和运动后的最大自主收缩（MVCs）时间点测定扭矩。在每次训练前后，在20% MVC的等距收缩期间，记录股直肌（RF）和股内侧肌（VM）的表面肌电图活动（均方根[RMS]和中位数频率[MF]）。转矩在hi和LI BFR后下降（分别为- 9.5%和-7.8%,p < 0.01），但LI非BFR后无下降。HI训练后，MF在VMand rfmuscle中降低（分别为- 5.3%和-12.5%）
Numerous studies have reported similar neuromuscular adaptations between low-intensity (LI) blood-flow restricted exercise (BFRE) and high-intensity (HI) resistance training. Unfortunately, none of these experimental designs individualized blood flow restriction (BFR) levels to each participant. Thus, their findings are difficult to interpret. We aimed at comparing the acute effects of LI BFR (80% of absolute vascular occlusion pressure) with LI non-BFR and HI training on muscle torque, activation, and neuromuscular fatigue. Ten men (23.8 6 5.4 years) exercised at 20 and 75% of 1 repetition maximum with and without BFR (for LI). Blood flow restriction pressure was determined individually using resting blood-flow measurements. Torque was determined during maximal voluntary contractions (MVCs) at pre-exercise and postexercise time points. Surface electromyographic activity (root mean square [RMS] and median frequency [MF]) was recorded for the rectus femoris (RF) and vastus medialis (VM) muscles, before and after each session of training, during isometric contractions at 20% MVC. Torque decreased post-HI and LI BFR (-9.5 and -7.8%, respectively; p < 0.01), but not after LI non-BFR. The MF was reduced following HI training in the VMand the RFmuscles (-5.3 and -12.5%, respectively; p