Dimensions of fatigue in different working populations

Perceived fatigue related to work has often been measured in one dimension. The main purpose of the present study was to validate a proposed five-fact or model of perceived fatigue in a new sample. 597 persons, employed in fiv e occupations with different types of work loads, rated their fatigue after work. The ratings were subjected to analyses of linear structural equation models. The results suggest a slightly revised model For perceived fatigue , still with the five dimensions; Lack of energy, Physical exertion, Physic al discomfort, Lack of motivation and Sleepiness. As expected, the rating p rofiles describing fatigue states differed between the five occupations. On the basis of these results, a revised version of the Swedish Occupational Fatigue Inventory (SOFI) is presented.