School of Aerospace, Harbin Institute of Technology, Harbin, Heilongjiang, China.
China Basketball College, Beijing Sport University, Beijing, Beijing, China.
PLoS One. 2023 Jun 26;18(6):e0285015. doi: 10.1371/journal.pone.0285015. eCollection 2023.
This work was aimed to analyze the effect of vitamin energy drink on muscle fatigue by surface electromyography (SEMG) and ultrasonic bioimaging (USBI).
20 healthy men were selected to do increasing load fatigue test. Surface electromyographic signals and ultrasonic biological images were collected based on wavelet threshold function with improved thresholds. Time domain and frequency domain characteristic integrated electromyography (IEMG), root mean square amplitude (RMS), average power frequency (MPF), and surface and deep muscle morphological changes were analyzed. Hemoglobin concentration (HB), red blood cell number (RBC), mean volume of red blood cell (MCV), blood lactic acid (BLA), malondialdehyde (MDA), and phosphocreatine kinase (CK) were measured.
Surface electromyographic signal and ultrasonic biological image can be used as auxiliary monitoring techniques for muscle fatigue during exercise. Drinking vitamin energy drinks before exercise can relieve physical fatigue to a certain extent and promote the maintenance of muscle microstructure.
本研究旨在通过表面肌电图(SEMG)和超声生物成像(USBI)分析维生素能量饮料对肌肉疲劳的影响。
选择 20 名健康男性进行递增负荷疲劳试验。基于改进阈值的小波阈值函数,采集表面肌电信号和超声生物图像。分析时域和频域特征综合肌电图(IEMG)、均方根振幅(RMS)、平均功率频率(MPF)以及表面和深部肌肉形态变化。测量血红蛋白浓度(HB)、红细胞数(RBC)、红细胞平均体积(MCV)、血乳酸(BLA)、丙二醛(MDA)和磷酸肌酸激酶(CK)。
1)长短期记忆(LSTM)特异性模型对肌肉疲劳识别的准确率(94.10%)、灵敏度(94.43%)、特异性(93.75%)和精度(94.07%)均高于其他模型。2)与对照组相比,实验组运动后 BLA、MDA 和 CK 水平降低,HB 水平升高(P<0.05)。3)实验组 IEMG 和 RMS 高于对照组,且随时间增加而增加(P<0.05)。4)响应信号的平均幅度随时间而降低。与对照组相比,实验组表面肌肉厚度、深部肌肉厚度、总肌肉厚度、对比度和均匀度(HOM)降低,而角二阶矩(ASM)和对比度增加,差异有统计学意义(P<0.05)。
运动中表面肌电信号和超声生物图像可作为肌肉疲劳的辅助监测技术。运动前饮用维生素能量饮料可在一定程度上缓解身体疲劳,促进肌肉微观结构的维持。