College of Sports Science, Nantong University, Nantong 226019, China.
China Institute of Sport Science, Beijing 100061, China.
Int J Environ Res Public Health. 2022 Jun 8;19(12):7042. doi: 10.3390/ijerph19127042.
The purpose of this study was to investigate the effect of transcranial pulsed current stimulation (tPCS) on fatigue delay after medium-intensity training. Materials and Methods: Ninety healthy college athletes were randomly divided into an experimental group (n = 45) and control group (n = 45). The experimental group received medium-intensity training for a week. After each training, the experimental group received true stimulation of tPCS (continuous 15 min 1.5 mA current intensity stimulation). The control group received sham stimulation. The physiological and biochemical indicators of participants were tested before and after the experiment, and finally 30 participants in each group were included for data analysis. Results: In the experimental group, creatine kinase (CK), cortisol (C), time-domain heart rate variability indices root mean square of the successive differences (RMSSD), standard deviation of normal R-R intervals (SDNN), and frequency domain indicator low frequency (LF) all increased slowly after the intervention. Among these, CK, C, and SDNN values were significantly lower than those in the control group (p < 0.05). Testosterone (T), T/C, and heart rate variability frequency domain indicator high frequency (HF) in the experimental group decreased slowly after the intervention, and the HF value was significantly lower than that in the control group (p < 0.05). The changes in all of the indicators in the experimental group were smaller than those in the control group. Conclusion: The application of tPCS after medium-intensity training enhanced the adaptability to training and had a significant effect on the maintenance of physiological state. The application of tPCS can significantly promote the recovery of autonomic nervous system function, enhance the regulation of parasympathetic nerves, and delay the occurrence of fatigue.
本研究旨在探讨经颅脉冲电流刺激（tPCS）对中强度训练后疲劳延迟的影响。
90 名健康大学生运动员被随机分为实验组（n=45）和对照组（n=45）。实验组进行了一周的中强度训练。每次训练后，实验组接受真实的 tPCS 刺激（连续 15 分钟 1.5 mA 电流强度刺激）。对照组接受假刺激。实验前后测试了参与者的生理生化指标，最终每组有 30 名参与者纳入数据分析。
在实验组中，肌酸激酶（CK）、皮质醇（C）、时域心率变异性指标均方根差的连续差值（RMSSD）、正常 R-R 间期的标准差（SDNN）和频域指标低频（LF）在干预后均缓慢增加。其中，CK、C 和 SDNN 值明显低于对照组（p<0.05）。实验组睾酮（T）、T/C 和心率变异性频域指标高频（HF）在干预后缓慢下降，HF 值明显低于对照组（p<0.05）。实验组所有指标的变化均小于对照组。
中强度训练后应用 tPCS 增强了对训练的适应性，对维持生理状态具有显著效果。tPCS 的应用可显著促进自主神经系统功能的恢复，增强副交感神经的调节作用，延缓疲劳的发生。
