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Wyświetlanie 1-2 z 2
Tytuł:
Offshore Fleet Workers and the Circadian Adaptation of Core Body Temperature, Blood Pressure and Heart Rate to 12-h Shifts: A Field Study
Autorzy:
Hansen, J. H.
Geving, I. H.
Reinertsen, R. E.
Powiązania:
https://bibliotekanauki.pl/articles/91164.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
offshore fleet
circadian rhythms
blood pressure
heart rate
core temperature
Opis:
Objectives. The aim of this study was to investigate the circadian adaptation of tcr (core body temperature), BP (blood pressure), HR (heart rate) and subjective sleep quality after 7 days of working 12-h night shifts in offshore fleet workers. Methods. Night workers (N = 7) (18:00–6:00) and day workers (N = 7) (6:00–18:00) were recruited from a Norwegian offshore company operating in the North Sea. We measured tcr, BP and HR on days 1 and 7. Results. An increase of 0.6 oC (p = .03) was observed within the group of night workers from day 1 to day 7. Between the night and day workers there was a significant difference of 0.6 oC from day 1 to day 7 (p = .01). Sleep latency and sleep length also showed significant differences between the groups (p = .01 and p = .04). There was an interaction effect in tiredness during the shift (p = .02). Conclusion. The significant increase in tcr indicates an adaptation in the night workers to the new working schedule, and the extended working hours and sleep deprivation are hypothesized to be the main cause of the increased tcr. Light exposure, altered pattern of food availability and physical activity are likely to have contributed as well. Subjective sleep quality showed inconclusive results.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 4; 487-496
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Bright Light on Physiological Circadian Rhythms and Subjective Alertness of Shift Work Nurses in Iran
Autorzy:
Kakooei, H.
Ardakani, Z. Z.
Ayattollahi, M. T.
Karimian, M.
Saraji, G. B.
Owji, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/90524.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
circadian rhythms
shift work
nurse
bright light
alertness
melatonin
cortisol
body temperature
Opis:
In this study, the effects of bright light (BL) on the rhythms in body temperature, plasma melatonin, plasma cortisol and subjective alertness, in 34 shift work nurses at a university hospital were assessed. They were exposed to very BL (4 500 lx) during 2 breaks (21:15–22:00 and 3:15–4:00) or dim light (300 lx). The subjects were studied under 24 h of realistic conditions during which their plasma cortisol and melatonin were measured at 3-h intervals; their body temperature was also measured during and after night shift work. Subjective alertness was evaluated with the Karolinska sleepiness scale. Administration of BL significantly suppressed night-time melatonin levels. A one-way ANOVA revealed that BL tended to increase cortisol levels and body temperature and significantly improved alertness. These results demonstrate that photic stimulation in a hospital setting can have a powerful influence on the adjustment of the circadian system.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 4; 477-485
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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