Umezu Y, Kawazu T, Tajima F, Ogata H
Department of Rehabilitation Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
Arch Phys Med Rehabil. 1998 May;79(5):536-8. doi: 10.1016/s0003-9993(98)90069-7.
To investigate the difference in back muscle endurance between normal adult women and men using surface electromyographic (EMG) power spectral analyses.
Forty-five healthy subjects (22 men and 23 women) were studied during an unsupported trunk holding test for 120 seconds. Recording surface electrodes were placed over each erector spinae muscle at L1 level.
Median frequency (MF), mean power frequency (MPF), and zero crossing rate (ZCR) were evaluated using the ME3000P Fast Fourier Transform spectrum analysis program. The rate of change was determined for each parameter during the test, and correlation was examined by Pearson's correlation.
The negative slopes of all indices of back muscle fatigue were significantly steeper in men than in women.
Our results indicated that the trunk holding test combined with EMG power spectral analysis of lumbosacral muscles is useful for the evaluation of fatigue performance of these muscles. Our results also showed a higher muscle endurance in healthy adult women than in men.
采用表面肌电图（EMG）功率谱分析方法，研究正常成年女性和男性背部肌肉耐力的差异。
对45名健康受试者（22名男性和23名女性）进行了120秒的无支撑躯干保持测试。记录表面电极置于L1水平的每块竖脊肌上。
使用ME3000P快速傅里叶变换频谱分析程序评估中位频率（MF）、平均功率频率（MPF）和过零率（ZCR）。在测试过程中确定每个参数的变化率，并通过Pearson相关性检验相关性。
男性背部肌肉疲劳所有指标的负斜率均显著陡于女性。
我们的结果表明，躯干保持测试结合腰骶部肌肉的EMG功率谱分析，有助于评估这些肌肉的疲劳表现。我们的结果还显示，健康成年女性的肌肉耐力高于男性。
