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LINDSTR~M, LARS, ROLAND KADEFORS, AND INGEMAR PETER&N. An electromyographic index for localized muscle fatigue. J. Appl. Physiol.: Respirat. Environ. Exercise Physiol. 43(4): 750-754, 1977. -A new method for objective quantification of localized muscle fatigue is described. The method is based on power spectrum analysis of myoelectric signals obtained from the fatigued muscle. It permits real-time investigations and yields statistically based criteria for the occurrence of fatigue. The findings are interpreted in terms of muscle action potential conduction velocity changes and rate of the fatigue development. quantitative electromyography; muscle action potential conduction velocity; fatigue probability; fatigue index; work physiology; ergonomics; human beings; objective evaluation; fast Fourier transform; digital computer; power spectrum analysis; regression analysis in the action potential conduction velocity. This velocity change was traced back to alterations in the energy metabolism of the muscle. Analysis of the spectral changes of the myoelectric signal thus makes it possible to measure localized muscle fatigue objectively. A number of such investigations into industrial work have in fact already been SUSTAINED FORCEFUL I'nUSCle COntraCtiOnS CaUSe SO- called localized muscle fatigue - motor decrement and pain confined to the muscle (1) -which can be observed as changes in the properties of the myoelectric
Journal of Applied Physiology – The American Physiological Society
Published: Oct 1, 1977
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