Osness Human Performance Laboratories, Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, Kansas.
J Strength Cond Res. 2019 Aug;33(8):2074-2086. doi: 10.1519/JSC.0000000000002561.
Ciccone, AB, Deckert, JA, Schlabs, CR, Tilden, MJ, Herda, TJ, Gallagher, PM, and Weir, JP. Transcranial direct current stimulation of the temporal lobe does not affect high-intensity work capacity. J Strength Cond Res 33(8): 2074-2086, 2019-Stimulation of the left insular cortex may affect heart rate variability (HRV) and exercise effort perception. These studies investigated the effects transcranial direct current stimulation (tDCS) and electrode orientation on HRV and repeated maximal knee extensions. In study 1, after sham stimulation, anodal left temporal lobe stimulation, or anodal right temporal lobe stimulation, 10 male and 10 female subjects (age = 21.0 ± 1.5 years) completed 50 maximum isokinetic extensions at 180°·s. There was a significant effect of stimulation condition on HRV for only 1 (SD2; p = 0.037; η = 0.159) of 5 HRV metrics. There was no significant effect on isokinetic fatigue percent or isokinetic work (all p ≥ 0.278; all η ≤.065). It has been proposed that placing the cathode electrode on the shoulder may differentially affect tDCS. Therefore, in study 2, the effects of electrode orientation on tDCS-induced changes in HRV was assessed in 10 healthy females and 8 healthy males (21.6 ± 2.5 years) who completed cephalic, extracephalic, and sham trials. In the cephalic montage, the anode was placed over the left temporal lobe and the cathode was placed over right prefrontal cortex. In the extracephalic montage, the cathode was placed on the shoulder on the same side of the body as the anode. Neither cephalic nor extracephalic montages affected HRV (all p ≥ 0.152; all η ≤.105). These data suggest that anodal tDCS of the insular cortex has little effect on HRV, and does not improve high-intensity exercise performance in the current population. Therefore, anodal tDCS applied over the left temporal lobe is not recommended for high-intensity performance enhancement.
西科恩、AB、德克斯特、JA、施拉布斯、CR、蒂尔登、MJ、赫达、TJ、加拉格尔、PM 和韦尔、JP。经颅直流电刺激颞叶不会影响高强度工作能力。J 力量与条件研究 33(8)：2074-2086，2019-刺激左岛叶可能会影响心率变异性 (HRV) 和运动努力感知。这些研究调查了经颅直流电刺激 (tDCS) 和电极方向对 HRV 和重复最大膝关节伸展的影响。在研究 1 中，在假刺激、左侧颞叶阳极刺激或右侧颞叶阳极刺激后，10 名男性和 10 名女性受试者（年龄=21.0±1.5 岁）完成了 50 次最大等速膝关节伸展运动，角速度为 180°·s。只有 5 个 HRV 指标中的 1 个（SD2；p=0.037；η=0.159）的刺激条件对 HRV 有显著影响。对等速疲劳百分比或等速工作没有显著影响（所有 p≥0.278；所有η≤0.065）。有人提出，将阴极电极放置在肩部可能会对 tDCS 产生不同的影响。因此，在研究 2 中，评估了电极方向对 10 名健康女性和 8 名健康男性（21.6±2.5 岁）的 tDCS 诱导的 HRV 变化的影响，他们完成了头侧、头外和假刺激试验。在头侧装置中，阳极放置在左颞叶上方，阴极放置在右前额叶皮质上。在头外装置中，阴极放置在与阳极同侧的肩部。头侧和头外装置都没有影响 HRV（所有 p≥0.152；所有η≤0.105）。这些数据表明，岛叶的阳极 tDCS 对 HRV 的影响很小，并且不能提高当前人群的高强度运动表现。因此，不建议将左颞叶上方的阳极 tDCS 用于高强度性能增强。
