Summary
This paper describes rest/activity rhythms of permanent shift workers: rotary printers. They reported during one week the hours of their sleep onset and of their meals, and their subjective appreciation of tiredness and mood. The average sleep duration (7.84 h) can be compared with that of day workers and is fairly longer than the duration of day sleep of shift workers when they are on nightshift. This long sleep can be accounted for by: (1) the early bedtime (around 05.00 h), (2) an adjustment of biological rhythms to the schedule inversion.
Other evidence (naps, meal time) supports the hypothesis of a physiological adjustment. It is pointed out that this adjustment is fragile: the printers must have very rigid life habits and schedules (sleep, meals). Each time they change this strategy (especially during week-end) it is subjectively felt as detrimental.
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References
Åkerstedt, T., Torsvall, L.: Experimental changes in shift schedules. Their effects on well-being. Ergonomics 21, 849–856 (1978)
Bjerner, B., Holm, A., Swensson, Å.: Diurnal variations in mental performance: a study of threeshift workers. Br. J. Ind. Med. 12, 103–110 (1955)
Colquhoun, W. P., Blake, M. J. F., Edwards, R. S.: Experimental studies of shift work. I. A comparison of “rotating” and “stabilized” four-hour shift systems. Ergonomics 11, 437–453 (1968a)
Colquhoun, W. P., Blake, M. J. F., Edwards, R. S.: Experimental studies of shift work. II. Stabilized eight-hour shift systems. Ergonomics II, 527–546 (1968b)
Colquhoun, W. P., Blake, M. J. F., Edwards, R. S.: Experimental studies of shift work. III. Stabilized twelve-hour shift systems. Ergonomics 12, 865–882 (1969)
Conroy, R. T. W. M., Elliott, A. L., Mills, J. N.: Circadian rhythms in plasma concentration of 11-Hydroxycorticosteroids in men working in night shift and in permanent night workers. Br. J. Med. Psychol. 27, 170–174 (1970)
Debry, G., Bleyer, R.: Influence du rythme des 3 x 8 sur l'alimentation des travailleurs. In: Alimentation et travail, G. Debry, R. Bleyer (eds.), pp. 153–172. Paris: Masson 1972
Evans, F. J., Cook, M. R., Cohen, H. D., Orne, E. C., Orne, M. T.: Appetitive and replacement naps: EEG and behavior. Science 197, 687–689 (1977)
Foret, J.: Sommeil et horaires de travail irréguliers. Dissertation, Lille 1973
Foret, J.: L'homme en activité et son sommeil. Le Travail Humain 41, 43–54 (1978)
Foret, J., Benoit, O.: Structure du sommeil chez des travailleurs à horaires alternants. Electroencephalogr. Clin. Neurophysiol. 37, 337–344 (1974)
Foret, J., Benoit, O.: Etude du sommeil de travailleurs à horaires alternants. Adaptation et récupération dans le cas de rotation rapide de poste (3–4 jours). Eur. J. Appl. Physiol. 38, 71–82 (1978)
Knauth, P., Rutenfranz, J.: Untersuchungen zum Problem des Schlafverhaltens bei experimenteller Schichtarbeit. Int. Arch. Arbeitsmed. 30, l-22 (1972)
Lortie, M., Teiger, C., Laville, A.: Conditions de travail, état de santé et mortalité chez des travailleurs de nuit permanents (rotativistes de presse). Laboratoire de Physiologie du Travail, CNAM (in press)
Mott, P. E., Mann, F. C., McLoughlin, Q., Warwick, D. P.: Shiftwork. Ann. Arbor: University of Michigan Press 1965
Nachreiner, R., Frielingsdorf, R., Romahn, R., Knauth, P., Kuhlmann, W., Klimmer, R., Rutenfranz, J., Werner, E.: Schichtarbeit bei kontinuierlicher Produktion. Bundesanstalt für Arbeitsschutz und Unfallforschung Dortmund, 1975
Patkai, P., Åkerstedt, T., Pettersson, K.: Field studies of Shiftwork. I. Temporal patterns in psychophysiological activation in permanent night workers. Ergonomics 20, 611–619 (1977)
Reinberg, A., Migraine, C., Apfelbaum, M., Brigant, L., Ghata, J., Vieux, N., Laporte, A.: Circadian and ultradian rhythms in the feeding behavior and nutrient intake of oil refinery operators on a rapidly rotating shift system. Ergonomics 21, 862 (1978)
Rutenfranz, J., Colquhoun, W. P., Knauth, P., Ghata, J.: Biomedical and psychosocial aspects of shift work. Scand. J. Work. Environ. Health 3, 165–182 (1977)
Teleky, L.: Problems of night work. Influences on health and efficiency. Ind. Med. Surg. 12, 758–779 (1943)
Tune, G. S.: Sleep and wakefulness in a group of shiftworkers. Br. J. Ind. Med. 26, 54–58 (1969)
Ulich, E.: Zur Frage der Belastung des arbeitenden Menschen durch Nacht- und Schichtarbeit. Psychol. Rundschau 8, 42–61 (1957)
Ulich, E.: Schicht- und Nachtarbeit im Betrieb. Köln, Opladen: Westdeutscher Verlag 1964
Webb, W. B.: Sleep behavior as a biorhythm. In: Biological rhythms and human performance, W. P. Colquhoun (ed.), pp. 149–178. London: Academic Press 1971
Wyatt, S., Marriott, R.: Night work and shift changes. Br. J. Ind. Med. 10, 164–172 (1953)
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Lortie, M., Foret, J., Teiger, C. et al. Circadian rhythms and behavior of permanent nightworkers. Int. Arch Occup Environ Heath 44, 1–11 (1979). https://doi.org/10.1007/BF00381204
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DOI: https://doi.org/10.1007/BF00381204