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Etude ergonomique des processus de fatigue en milieu maritime : analyse comparée de situations professionnelles distinctes

Abstract : Our ergonomic approach analyzed the dynamics of the fatigue processes through different maritime professions. The data were collected in “natural” situations across four field studies: pelagic trawlers’ captains, oceanographical ship seamen, solo race’s yachtsmen, and pump dredger’s seamen. Two types of data must be distinguished: those issued from perceived fatigue and those from the ‘real’, physiological, fatigue of the organism. From a psychological point of view, our methodology combined direct observation with non-directive interviews. Concerning the physiological fatigue, measurements of the heart rate on interval R-R were carried out (stand-tests and continuous recordings simultaneously with activity). Our results issue from the confrontation of objective and subjective sources. First, the work rhythms are a preponderant cause of fatigue, with sleep strains, and alternation of activity. Then, fatigue shows sleep disorders, lassitude, and cumulative effect (of which intensity varies according to the professions). Thus, seamen can manage their fatigue with sleep periods repartition, recovery on the ground, and eating food. In addition, we point some solutions to adjust the activity of the seamen to their fatigue processes.
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Bastien Sennegon. Etude ergonomique des processus de fatigue en milieu maritime : analyse comparée de situations professionnelles distinctes. Médecine humaine et pathologie. Université d'Orléans, 2009. Français. ⟨NNT : 2009ORLE2027⟩. ⟨tel-00459783⟩

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