A method and device arrangement are for indicating a state of overstress in a nervous muscular system. An interference current, the frequency and current strength of which can be adjusted, is fed into a part of the nervous muscular system. Those adjustment values of the interference current are stored, which cause one of a set of predetermined physical sensations in the examined part of the nervous muscular system. A measurement-specific average of the strength of the interference current is calculated for each predetermined physical response or sensation in the examined part of the examined nervous muscular system. The measurement-specific average of the interference current for each physical sensation is normalised and a state of overstress of the nervous muscular system is indicated, if the measurement-specific normalised average of the interference current of the physical sensation does not fulfil a set statistical criteria.
