Measurement and analysis of surface myoelectric signals during fatigued cyclic dynamic contractions

被引:31
作者
Cifrek, M
Tonkovic, S
Medved, V
机构
[1] Univ Zagreb, Fac Elect & Comp Engn, Dept Elect Syst & Informat Proc, HR-10000 Zagreb, Croatia
[2] Univ Zagreb, Fac Phys Educ, HR-10000 Zagreb, Croatia
关键词
muscle fatigue; dynamic contractions; surface electromyography; EMG; time-frequency analysis;
D O I
10.1016/S0263-2241(99)00059-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A method of surface myoelectric (ME) signal measurement and analysis, with the aim of evaluating muscle fatigue during cyclic dynamic contractions of quadriceps muscle (lower leg extension and flexion exercise on 'leg-extension' training device), was developed. As an indicator of muscle fatigue a change in the power spectrum median frequency (MF), calculated from the spectrogram, has been used. Our method considers the maximum median frequency values during each contraction. A slope of the regression line (Hz/min) that fits the maximum values of MF in a least-square sense was used as a fatigue index. Dependencies of the muscle fatigue index, as well as median frequencies at the beginning of the exercise on spectrogram analysis parameters were considered, and analysis parameters for reliable results were chosen. Values of the slope of the regression line and MF at the beginning of an exercise are in agreement with the notion that rectus femoris has higher muscle fibre conduction velocity than both vasti muscles. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:85 / 92
页数:8
相关论文
共 19 条
[1]  
Basmajian J. V., 1985, MUSCLES ALIVE THEIR
[2]   Analysis of myoelectric signals recorded during dynamic contractions - A time-frequency approach to assessing muscle fatigue [J].
Bonato, P ;
Gagliati, G ;
Knaflitz, M .
IEEE ENGINEERING IN MEDICINE AND BIOLOGY MAGAZINE, 1996, 15 (06) :102-111
[3]  
CIFREK M, 1997, THESIS U ZAGREB ZAGR
[4]  
De Luca C. J., 1992, NEUROMUSCULAR FATIGU, P44
[5]  
DE LUCA CJ, 1984, CRIT REV BIOMED ENG, V11, P251
[6]   THE RELATIONSHIP BETWEEN CONTRACTION AND RELAXATION DURING FATIGUING ISOKINETIC SHOULDER FLEXIONS - AN ELECTROMYOGRAPHIC STUDY [J].
ELERT, J ;
GERDLE, B .
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY, 1989, 59 (04) :303-309
[7]   DEPENDENCE OF THE MEAN POWER FREQUENCY OF THE ELECTROMYOGRAM ON MUSCLE FORCE AND FIBER TYPE [J].
GERDLE, B ;
HENRIKSSONLARSEN, K ;
LORENTZON, R ;
WRETLING, ML .
ACTA PHYSIOLOGICA SCANDINAVICA, 1991, 142 (04) :457-465
[8]  
HLAWATSCH F, 1991, 12910001 U RHOD ISL
[9]   ERRORS IN FREQUENCY PARAMETERS OF EMG POWER SPECTRA [J].
HOF, AL .
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 1991, 38 (11) :1077-1088
[10]   RELATIONSHIPS BETWEEN MUSCLE LACTATE ACCUMULATION AND SURFACE EMG ACTIVITIES DURING ISOKINETIC CONTRACTIONS IN MAN [J].
HORITA, T ;
ISHIKO, T .
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY, 1987, 56 (01) :18-23