Hotta Yu, Ito Kenichi
Niigata Institute of Technology, 1719 Fujihashi, Kashiwazaki 945-1195, Japan.
Annu Int Conf IEEE Eng Med Biol Soc. 2011;2011:3877-9. doi: 10.1109/IEMBS.2011.6090963.
This study assessed muscle fatigue during low-level contraction, which is sometimes difficult to observe. Surface EMG signals were recorded with monopolar and bipolar configurations during low-level isometric muscle contraction under a blood flow restriction condition (BFR condition) and a non-blood flow restriction condition (CON condition). As indices of fatigue, center frequency (CF) of the power spectral density (PSD) of the surface EMG and rating of perceived exertion (RPE) with the Borg CR-10 Scale were used. Results suggested that the monopolar configuration, which has a wider detection area relative than the bipolar one, was well suited for obtaining wave slowing accompanied by muscle fatigue. In addition, the monopolar configuration could detect differences in muscle condition in the BFR and CON conditions.
本研究评估了低水平收缩期间的肌肉疲劳，这种疲劳有时难以观察到。在血流限制条件（BFR条件）和非血流限制条件（CON条件）下进行低水平等长肌肉收缩时，采用单极和双极配置记录表面肌电图信号。作为疲劳指标，使用了表面肌电图功率谱密度（PSD）的中心频率（CF）和Borg CR-10量表的主观用力感觉评级（RPE）。结果表明，与双极配置相比检测区域更宽的单极配置非常适合获取伴随肌肉疲劳的波幅减慢。此外，单极配置可以检测BFR和CON条件下肌肉状况的差异。
