Ergonomics: Three Characteristics patterns of subjective fatigue symptoms.H. Yoshitake

Institute for Science of Labour, Kanagawa, Japan

An extensive field survey of subjective symptoms of fatigue revealed three characteristic patterns. One, in which ‘ drowsiness and dullness ‘ predominated, was frequent both among those who reported many symptoms and those who reported few and was not characteristic of any particular type of work. A second, in which “ inability to concentrate ” was prominent, was more frequent among those who reported many symptoms and was characteristic of mental workers, especially after night work. A third pattern, in which awareness of physical discomfort was characteristic, was found mainly among those who reported few symptoms and were engaged in physical work.

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