Transcutaneous spinal direct current stimulation induces lasting fatigue resistance and enhances explosive vertical jump performance.
Transcutaneous spinal direct current stimulation induces lasting fatigue resistance and enhances explosive vertical jump performance.
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经皮脊柱直流电刺激可产生持久的抗疲劳能力，增强爆发力垂直跳跃能力。
DOI：
10.1371/journal.pone.0173846
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Conway BA
中科院分区：
文献类型：
--
作者：
Berry HR;Tate RJ;Conway BA
经皮脊髓直流电刺激（tsDCS）是一种非侵入性神经调节干预，已被证明可以改变动物和人类脊髓和脊髓上回路的兴奋性。我们在这项研究中的目的是探讨功能性神经调节潜力的tsDCS检查其直接和持久的影响，在重复性能的全身最大的运动在健康志愿者。使用双盲、随机、交叉、假对照设计，我们研究了15分钟阳极tsDCS对刺激后0、20、60和180分钟重复垂直反向运动跳跃（VCJ）性能的影响。测量的峰值和起飞速度，垂直位移，峰值功率和在反向运动和推离VCJ阶段所做的工作来自12名健康参与者的垂直地面反作用力（12个性能参数）的变化。对于12项VCJ性能测量中的7项，从刺激前到刺激后VCJ性能变化的幅度和方向在假手术和活性tsDCS之间存在显著差异（P < 0.05）。这些差异包括VCJ位移/做功的假手术后疲劳、峰间功率和起飞速度，以及活动tsDCS后对该疲劳效应的恢复力。此外，运动成绩和总功也有提高（P < 0.05）。这些变化在tsDCS后随时间的重复VCJ性能之间没有变化（P > 0.05）。我们最初的研究结果表明，在健康受试者中进行的一次阳极tsDCS可以防止疲劳，并在三个小时内重复进行VCJ组时保持或增强全身爆发性运动功率的不同方面。所观察到的影响进行了讨论，在中枢疲劳机制的改变，在跳跃执行和脊髓兴奋性的变化过程中的肌肉收缩模式。这些发现对力量耐力运动表现和神经运动康复具有重要意义。
Transcutaneous spinal direct current stimulation (tsDCS) is a non-invasive neuromodulatory intervention that has been shown to modify excitability in spinal and supraspinal circuits in animals and humans. Our objective in this study was to explore the functional neuromodulatory potential of tsDCS by examining its immediate and lasting effects over the repeated performance of a whole body maximal exercise in healthy volunteers. Using a double-blind, randomized, crossover, sham-controlled design we investigated the effects of 15 min of anodal tsDCS on repeated vertical countermovement jump (VCJ) performance at 0, 20, 60, and 180 minutes post-stimulation. Measurements of peak and take-off velocity, vertical displacement, peak power and work done during countermovement and push-off VCJ phases were derived from changes in vertical ground reaction force (12 performance parameters) in 12 healthy participants. The magnitude and direction of change in VCJ performance from pre- to post-stimulation differed significantly between sham and active tsDCS for 7 of the 12 VCJ performance measures (P < 0.05). These differences comprised of a post-sham fatigue in VCJ displacement/work done, peak to peak power and take-off velocity, and a resilience to this fatigue effect post-active tsDCS. In addition there was also an enhancement of countermovement performance and total work done (P < 0.05). These changes did not vary across repeated VCJ performances over time post-tsDCS (P > 0.05). Our original findings demonstrate that one single session of anodal tsDCS in healthy subjects can prevent fatigue and maintain or enhance different aspects of whole body explosive motor power over repeated sets of VCJs performed over a period of three hours. The observed effects are discussed in relation to alterations in central fatigue mechanisms, muscle contraction mode during jump execution and changes in spinal cord excitability. These findings have important implications for power endurance sport performance and for neuromotor rehabilitation.