SUBJECTIVE AND OBJECTIVE EVALUATION OF SHOULDER MUSCLE FATIGUE
SUBJECTIVE AND OBJECTIVE EVALUATION OF SHOULDER MUSCLE FATIGUE
复制标题
DOI：
10.1080/00140139408964911
复制
发表时间：
1994-08-01
期刊：
影响因子：
2.4
通讯作者：
KADEFORS, R
中科院分区：
文献类型：
--
作者：
OBERG, T;SANDSJO, L;KADEFORS, R
为了将局部肌肉疲劳的肌电图迹象与主观感知的肌肉疲劳联系起来，对 20 名健康志愿者进行了一项研究，通过将手臂抬高到外展 90 度来暴露他们的右侧斜方肌。每个人进行两次收缩：5 分钟内手部负荷为 0 公斤，2.5 分钟内手部负荷为 2 公斤。记录表面肌电图并分析 RMS 振幅和平均功率频率 (MPF)。主观肌肉疲劳通过心理物理学评定量表（博格 CR-10 量表）进行评估。在高负荷水平下，我们发现 MPF 和 CR 分数之间存在显着相关性 (r = - 0.46)，但在低负荷水平下则没有相关性。在高负荷水平下，MPF 随着负荷剂量的增加而线性下降，但在低负荷水平下，尽管有明显的主观疲劳，但 MPF 没有变化。随着负荷剂量的增加，CR 分数呈线性上升，在高负荷水平下更为明显。结论是，在工作生活中常见的低负荷水平下，MPF 和主观评分似乎提供了不同的疲劳信息。此外，在如此低的负荷水平下，MPF 似乎不能作为肌肉疲劳的有效估计器。如果要在静态低负载情况下使用，建议小心。
In order to relate EMG signs of localized muscle fatigue to subjectively perceived muscle fatigue, a study was undertaken on 20 healthy volunteers exposing their right trapezius muscle by raising the arm to 90-degrees of abduction. Every person performed two contractions: 0 kg hand load during 5 min and 2 kg hand load during 2.5 min. Surface EMG was recorded and analysed with respect to RMS amplitude and mean power frequency (MPF). Subjective muscle fatigue was estimated with a psychophysical rating scale (Borg's CR-10 Scale). At high load level we found a significant correlation between MPF and the CR-scores (r = - 0.46), but at low load level there was no correlation. At high load level there was a linear decrease of MPF with increasing load dose, but at low load level the MPF did not change, despite significant subjective fatigue. There was a linear rise of the CR-score with increasing load dose, more pronounced at high load level. It was concluded, that at low load levels common in working life, MPF and subjective scores seem to provide different fatigue information. Moreover, the MPF did not seem to work as a valid estimator of muscle fatigue at this low load level. Caution is recommended if it is to be used in static low-load situations.