Acute effects of repetitive peripheral magnetic stimulation following low-intensity isometric exercise on muscle swelling for selective muscle in healthy young men
Acute effects of repetitive peripheral magnetic stimulation following low-intensity isometric exercise on muscle swelling for selective muscle in healthy young men
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低强度等长运动后重复外周磁刺激对健康年轻男性选择性肌肉肿胀的急性影响
DOI：
10.1080/15368378.2021.1907402
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发表时间：
2021
影响因子：
1.7
通讯作者：
Ichihashi Noriaki
中科院分区：
文献类型：
--
作者：
Hirono Tetsuya;Ikezoe Tome;Taniguchi Masashi;Nojiri Shusuke;Tanaka Hiroki;Ichihashi Noriaki
重复外周磁刺激（rPMS）是一种非侵入性刺激器，可以在选择性区域诱导强烈的肌肉收缩。本研究旨在测量低强度运动后由rPMS诱导的骨骼肌厚度的急性变化。15名健康的年轻男性进行了等距膝伸肌运动在30%的最大力量组成的三套10收缩他们的优势腿。然后以rPMS器械的最大强度对股外侧肌（VL）施加rPMS。使用超声设备测量股直肌（RF）和VL的肌肉厚度，并在基线、运动后和rPMS后进行比较。与基线值相比，运动后RF和VL的肌肉厚度均显著增加（RF：基线; 24.7 ± 2.4，运动后; 25.3 ± 2.4 mm，p= 0.034，VL：基线; 27.0 ± 2.8，运动后; 27.4 ± 2.8 mm，p= 0.006）。与运动后相比，仅VL在rPMS后显著增加（VL：rPMS后; 28.3 ± 2.9 mm，p= .002）。这些发现表明，低强度的等长运动可以诱导急性增加肌肉厚度（肌肉肿胀），在运动后的rPMS可以通过重复肌肉收缩诱导进一步急性肌肉肿胀。
Repetitive peripheral magnetic stimulation (rPMS) is a non-invasive stimulator that can induce strong muscle contraction in selective regions. This study aimed to measure acute changes in skeletal muscle thickness induced by rPMS following a low-intensity exercise. Fifteen healthy young men performed an isometric knee extensor exercise at 30% of maximum strength consisting of three sets of 10 contractions on their dominant leg. rPMS was then applied on the vastus lateralis (VL) at the maximum intensity of the rPMS device. Muscle thicknesses of the rectus femoris (RF) and VL were measured using an ultrasound device and were compared among baseline, post-exercise, and post-rPMS. There were significant increases in muscle thickness of both the RF and VL post-exercise compared with baseline values (RF: baseline; 24.7 ± 2.4, post-exercise; 25.3 ± 2.4 mm,p= .034, VL: baseline; 27.0 ± 2.8, post-exercise; 27.4 ± 2.8 mm,p= .006). Compared with post-exercise, there was a significant increase post-rPMS in only the VL (VL: post-rPMS; 28.3 ± 2.9 mm,p= .002). These findings suggest that low-intensity isometric exercise can induce acute increases in muscle thickness (muscle swelling) in synergist muscles, and rPMS following exercise can induce further acute muscle swelling via repetitive muscle contraction.