Differential effects of transcranial direct current stimulation on sprint and endurance cycling
Differential effects of transcranial direct current stimulation on sprint and endurance cycling
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DOI：
10.1002/tsm2.129
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发表时间：
2020-05-01
影响因子：
1.2
通讯作者：
Komiyama, Tomoyoshi
中科院分区：
文献类型：
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作者：
Sasada, Syusaku;Endoh, Takashi;Komiyama, Tomoyoshi
在训练有素的运动员中，在可比的实验条件下，我们研究了经颅直流电刺激(TDCS)(2 mA，15分钟)对运动皮质腿部区域是否改善了不同的骑行模式，即短距离短跑自行车和中耐力自行车。测试了三种不同的tdcs条件，即阳极、阴极和假电极。在tdcs之后，参与者进行8秒的最大努力冲刺自行车和亚最大功率耐力自行车，以恒速节奏骑行，直到筋疲力尽。耐力测试中，正极tdcs(715±/-225s)显著长于阴阳极tdcs(670+/-230s)和假tdcs(682+/-216 s)。在高强度骑行的耐力测试中，由于阳极tdcs的作用，骑行性能得到了改善，耗尽时间大约在100到200秒之间。在短跑测试中，无论是阳极型还是阴极型tDCS，其累积输出功率均高于假tdcs。我们的研究结果表明，运动腿区域上的阳极tdcs对骑行性能的影响强烈依赖于不同骑行模式下产生的中枢疲劳的不同发展。这些发现有助于理解tdcs对不同骑行模式的影响。
Among well-trained athletes and across comparable experimental conditions, we investigated whether transcranial direct current stimulation (tDCS) (2 mA, 15 minutes) applied to the leg area of the motor cortex improved different cycling modes, namely, short sprint cycling and middle endurance cycling. Three different tDCS conditions, namely anodal, cathodal, and sham, were tested. Following tDCS, participants performed maximum effort sprint cycling for 8 seconds and sub-maximum power endurance cycling at a constant speed cadence until exhaustion. In the endurance test, time to exhaustion after anodal tDCS (715 +/- 225 seconds) was significantly longer compared with after cathodal (670 +/- 230 seconds) or sham tDCS (682 +/- 216 seconds) conditions. Improvements in cycling performance due to anodal tDCS were observed in the endurance test with higher intensity cycling, with time to exhaustion approximately between 100 and 200 seconds. Neither anodal nor cathodal tDCS resulted in higher accumulative power output compared with sham tDCS in the sprint cycling test. Our findings suggest the effect of anodal tDCS over the motor leg area on cycling performance is strongly dependent on the differential development of central fatigue generated in different cycling modes. These findings aid understanding of the effects of tDCS on different cycling modes.