Abstract
A computer program is described which can provide either on-line or off-line analysis of the surface electromyogram (EMG) in man during submaximal isometric contractions. The intention of the program was to quantify the tension developed by, and the degree of fatigue induced in muscle during this form of exertion from the surface EMG. Six male and female volunteers served as subjects to test the program by exerting brief isometric contractions of their handgrip muscles at tensions ranging from 3 to 100% of their maximum strength and fatiguing isometric contractions at tensions ranging between 20 and 95% of their maximum strength. The results of these experiments showed that the program was able to estimate the tension developed by muscle within an average of 2.4% of the subject's maximum strength and estimate the duration of fatigue contractions within an average of 3.5% of the actual recorded endurance. The applications of this form of analysis to work physiology are discussed.
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