Polarity-dependent improvement of maximal-effort sprint cycling performance by direct current stimulation of the central nervous system
Polarity-dependent improvement of maximal-effort sprint cycling performance by direct current stimulation of the central nervous system
复制标题
通过中枢神经系统的直流电刺激来提高最大努力冲刺自行车性能的极性依赖性
DOI：
10.1016/j.neulet.2017.07.056
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发表时间：
2017
影响因子：
2.5
通讯作者：
TomoyoshiKomiyamd
中科院分区：
文献类型：
--
作者：
SyusakuSasada;TakashiEndoh;Tomoya Ishii;TomoyoshiKomiyamd
短跑运动的性能，如在短距离跑步或骑自行车，逐渐下降后，达到最大速度或节奏。这可能与中枢神经系统有关。脑刺激研究最近揭示了人类大脑和脊髓的可塑性，但目前还不清楚直流电刺激（DCS）如何影响短跑运动表现。为了解决这个问题，我们调查DCS对健康志愿者的短跑自行车性能的影响。DCS应用于腰脊髓（3 mA）或运动皮质的腿部区域（2 mA），持续15分钟，具有3种不同的极性：阳极、阴极和假手术。在DCS之后，受试者在恒定负荷下进行30 s的最大努力冲刺循环。在30 s期间，阴极经皮脊髓DCS至腰髓（tsDCS）后的合并平均功率显著大于阳极或假tsDCS。阴极刺激的改善在性能开始后0-5秒和20-25秒都是显著的。峰值功率无显著条件间差异。阳极经颅DCS至运动皮层（tDCS）后的合并平均功率显著大于阴极tDCS后，尽管阳极和假tDCS的平均功率无显著差异。阴极tsDCS后平均功率的增加可能是由于中枢疲劳的减少。这种刺激方法可能会提高短跑成绩。
Sprint motor performance, such as in short-distance running or cycling, gradually decreases after reaching a maximum speed or cadence. This may be attributed to the central nervous system. Brain stimulation studies have recently revealed the plastic nature of the human brain and spinal cord, but it is unclear how direct current stimulation (DCS) affects sprint motor performance. To address this issue, we investigated DCS’s effect on healthy volunteers’ sprint cycling performance. DCS was applied to the lumbar spinal cord (3 mA) or the leg area of the motor cortex (2 mA) for 15 min with 3 different polarities: anodal, cathodal, and sham. After DCS, the subjects performed maximal-effort sprint cycling for 30 s under a constant load. Pooled mean power during the 30 s was significantly greater after cathodal transcutaneous spinal DCS to the lumbar spinal cord (tsDCS) than anodal or sham tsDCS. The improvement with cathodal stimulation was notable both 0–5 and 20–25 s after the performance onset. There were no significant inter-conditional differences in peak power. Pooled mean power was significantly greater after anodal transcranial DCS to the motor cortex (tDCS) than after cathodal tDCS, although mean powers of anodal and sham tDCS were not significantly different. The increase in mean power after cathodal tsDCS could result from a reduction in central fatigue. This stimulus method might improve sprint performance.