This paper summarizes research project which investigated the signal characteristics of muscle action potential when the muscle is fatigued and evaluated these characteristics as a measure of muscle fatigue. Eight subjects participated in the study under conditions of static and dynamic loading of the biceps muscle. The level of loading varied as a percent of maximum isometric muscle strength. The paper presents a criteria which defines muscle fatigue and discusses predictive models for muscle fatigue using this criteria for both static and dynamic loading.
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