Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal.
CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal.
Sci Rep. 2020 Apr 30;10(1):7380. doi: 10.1038/s41598-020-64379-5.
Despite being apparently safe for most individuals, the impact of low intensity (LI) blood-flow restricted (BFR) exercise on nerve function and integrity is still obscure. We explored whether BFR (with and without exercise) alters the properties of nerve conduction measured at the level of the restricted limb. Thirteen healthy, young men (22.0 ± 1.7 years) were included in this study. Arterial occlusion pressure was taken at rest. Soleus M- and H-recruitment curves were constructed for all participants. H-wave latencies and amplitudes were obtained in three testing conditions (non-BFR vs. 60 vs. 80% BFR) at four different time points: [#1] non-restricted baseline, [#2] time control either with or without BFR, [#3] non-restricted pre-exercise, [#4] LI exercise either with or without BFR. Nerve conduction was estimated using the difference between the latency of H and M wave. BFR did not affect H-wave amplitude, either with or without exercise. The changes in the difference between H- and M-wave latency of over time were similar between all conditions (condition-by-time interaction: F = 0.7, p = 0.47). In conclusion, our data indicate that performing LI exercise with BFR, set at 60 or 80% BFR, does not exert a negative impact on sciatic-tibial nerve function. Thus, from a neurological standpoint, we provide preliminary evidence that LI BFR exercise may be regarded as a safe mode of resistance training in healthy young men.
尽管低强度（LI）血流限制（BFR）运动对大多数个体来说似乎是安全的，但它对神经功能和完整性的影响仍不清楚。我们探讨了 BFR（有运动和无运动）是否会改变受限肢体神经传导的特性。这项研究纳入了 13 名健康的年轻男性（22.0±1.7 岁）。在休息时测量动脉闭塞压。所有参与者均构建了比目鱼肌 M 和 H 募集曲线。在四个不同的时间点（非 BFR 与 60%和 80%BFR）的三种测试条件下（非 BFR 与 60%和 80%BFR）获得 H 波潜伏期和振幅：[#1]非受限基线，[#2]有或无 BFR 的时间对照，[#3]非受限运动前，[#4]有或无 BFR 的 LI 运动。神经传导是通过 H 波和 M 波潜伏期之间的差异来估计的。BFR 无论是有运动还是无运动，都不会影响 H 波振幅。随着时间的推移，H 波和 M 波潜伏期之间的差异的变化在所有条件下相似（条件-时间交互：F=0.7，p=0.47）。总之，我们的数据表明，以 60%或 80%BFR 进行 LI 运动，不会对坐骨-胫神经功能产生负面影响。因此，从神经学的角度来看，我们提供了初步证据表明，LI BFR 运动可以被视为健康年轻男性安全的抗阻训练模式。
