L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuit
The efficacy of a light/darkness intervention designed to promote circadian adaptation to night shift work was tested in this combined field and laboratory study. Six permanent night shift workers (mean age : 37.1 / s : 8.1 years) were instructed to expose themselves intermittently to full-spectrum...
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Institut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail (IRSST)
2005-05-01
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| Series: | Perspectives Interdisciplinaires sur le Travail et la Santé |
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| Online Access: | https://journals.openedition.org/pistes/3200 |
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| author | Diane Boivin Francine James Anny Casademont |
| author_facet | Diane Boivin Francine James Anny Casademont |
| author_sort | Diane Boivin |
| collection | DOAJ |
| description | The efficacy of a light/darkness intervention designed to promote circadian adaptation to night shift work was tested in this combined field and laboratory study. Six permanent night shift workers (mean age : 37.1 / s : 8.1 years) were instructed to expose themselves intermittently to full-spectrum bright white light (~2,000 lux) in the first 6 hours of their 8-hour shift. They were asked to shield themselves from morning sunlight with tinted lenses (neutral grey density, 15 % visual light transmission), and to maintain regular sleep/darkness episodes in darkened quarters beginning 2 hours after the end of each night shift. Five control group workers (41.1 / s : 9.9 years) were observed in the presence of a regular sleep/darkness schedule only. Constant routines performed before and after a sequence of ~12 night shifts over 3 weeks revealed that treatment group workers displayed significant shifts in the time of peak cortisol expression and a realignment of the rhythm with the night-oriented schedule. Smaller phase shifts suggesting an incomplete adaptation to the shift work schedule were observed in the control group. Our observations support a careful control of the pattern of light and darkness exposure for the adaptation of physiological rhythms to night shift work. |
| format | Article |
| id | doaj-art-b40f88216795443683bd557f579af6a0 |
| institution | Kabale University |
| issn | 1481-9384 |
| language | English |
| publishDate | 2005-05-01 |
| publisher | Institut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail (IRSST) |
| record_format | Article |
| series | Perspectives Interdisciplinaires sur le Travail et la Santé |
| spelling | doaj-art-b40f88216795443683bd557f579af6a02025-01-09T16:02:28ZengInstitut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail (IRSST)Perspectives Interdisciplinaires sur le Travail et la Santé1481-93842005-05-017210.4000/pistes.3200L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuitDiane BoivinFrancine JamesAnny CasademontThe efficacy of a light/darkness intervention designed to promote circadian adaptation to night shift work was tested in this combined field and laboratory study. Six permanent night shift workers (mean age : 37.1 / s : 8.1 years) were instructed to expose themselves intermittently to full-spectrum bright white light (~2,000 lux) in the first 6 hours of their 8-hour shift. They were asked to shield themselves from morning sunlight with tinted lenses (neutral grey density, 15 % visual light transmission), and to maintain regular sleep/darkness episodes in darkened quarters beginning 2 hours after the end of each night shift. Five control group workers (41.1 / s : 9.9 years) were observed in the presence of a regular sleep/darkness schedule only. Constant routines performed before and after a sequence of ~12 night shifts over 3 weeks revealed that treatment group workers displayed significant shifts in the time of peak cortisol expression and a realignment of the rhythm with the night-oriented schedule. Smaller phase shifts suggesting an incomplete adaptation to the shift work schedule were observed in the control group. Our observations support a careful control of the pattern of light and darkness exposure for the adaptation of physiological rhythms to night shift work.https://journals.openedition.org/pistes/3200night shift workcircadian rhythmssalivary cortisolphototherapyphase shift |
| spellingShingle | Diane Boivin Francine James Anny Casademont L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuit Perspectives Interdisciplinaires sur le Travail et la Santé night shift work circadian rhythms salivary cortisol phototherapy phase shift |
| title | L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuit |
| title_full | L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuit |
| title_fullStr | L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuit |
| title_full_unstemmed | L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuit |
| title_short | L’exposition contrôlée à la lumière et à l’obscurité ajuste le rythme du cortisol salivaire chez les travailleurs de nuit |
| title_sort | l exposition controlee a la lumiere et a l obscurite ajuste le rythme du cortisol salivaire chez les travailleurs de nuit |
| topic | night shift work circadian rhythms salivary cortisol phototherapy phase shift |
| url | https://journals.openedition.org/pistes/3200 |
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