摘要
本研究比较了等长负荷诱发肱二头肌疲劳过程中sEMG信号时域和频域指标变化的特异性、有效性和可靠性。研究发现 :( 1)频域指标在肌肉疲劳过程中均呈明显的直线递减型变化 ,而时域指标的变化则有较大的变异 ;( 2 )频域指标时间序列曲线的斜率不受受试者皮下脂肪厚度和肢体围度的影响 ,而时域指标则易受影响 ;( 3)频域指标时间序列曲线的斜率与负荷持续时间明显相关 ,而时域指标的相关不明显。
The purpose of this study was to compare the time and frequency charcteristics of sEMG signal and to identify some sEMG predictors of muscle functional level.All subjects performed muscle isometric loading test.The results showed (1) there are great individual differences iEMG; (2) both rate of MF and MPF decline showed a linear type decrease;(3) both MF,MPF decline rate have a significant correlations to endurance time.In conclusion,Mf and MPF decline rate used in present study were a reliable noninvasive predictor of muscle functional level.
出处
《体育与科学》
CSSCI
北大核心
2000年第5期27-28,35,共3页
Sports & Science
