1[3]Lind,AR:Amplitude of the surface electromyogram during fatiguing isometric contraction[J] Muscle Nerve,2:257-264,1979
2[4]Suboi,T,et al:Spectral analysis of electromyogramin lumbar muscles:fatigue included contraction[J].J Appl Physicol,69:361-366,1994
3[5]Roy,SH:Combined use of surface electromyographyand 31P-NMR spectroscopy for the study of muscle disorders[J].Physical Therapy,73(12):892-901,1993
4[6]Bilodeau.M,et al:Changes in the electromyographic spectrum power distribution caused by a progressive increase in the force level[J].Eur Appl Physiol,71:113-123,1995
