| Records |
| Author |
Pereira, É.F.; Louzada, F.M.; Moreno, C.R.C. |
| Title |
Not all adolescents are sleep deprived: A study of rural populations: Sleep duration in rural populations |
Type |
Journal Article |
| Year |
2010 |
Publication |
Sleep and Biological Rhythms |
Abbreviated Journal |
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| Volume |
8 |
Issue |
4 |
Pages |
267-273 |
| Keywords |
Human Health; Sleep |
Abstract  |
The objective of this study was to investigate the role of environmental factors in sleep duration among adolescents living in rural areas. A total of 1140 students (569 males), aged 10–19 years, and attending two schools in rural regions in southern Brazil, completed a questionnaire about their sleep habits. Demographic data were also obtained. Prevalence ratios (PR) were estimated for the cases of more than 9 h of sleep on weekdays. Sleep duration in adolescents with and without electric lighting at home was analyzed. Average sleep duration at night was 9.63 (1.64) h on school-going days and 10.14 (2.42) h on weekends. The prevalence of adolescents sleeping for more than 9 h at night on school-going days was 58.3%. Older adolescents showed a tendency to delay their sleep onset times, which is associated with a reduction of sleep duration. Adolescents without electric lighting at home slept longer on school-going days (P < 0.001) and on weekends (P= 0.013) when compared to those with electric lighting at home. From multivariate analysis, age (P < 0.001), school schedule (P= 0.007) and work (0.042) were factors affecting sleep duration. In contrast to the data previously reported for urban populations, we found a high prevalence of adolescents sleeping for more than 9 h on school nights. Data on populations living in less industrialized regions reinforce the idea that technological advances are associated with the negative impact of sleep phase delay in adolescents. |
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1446-9235 |
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LoNNe @ kyba @ |
Serial |
1482 |
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| Author |
Escobar, C.; Salgado-Delgado, R.; Gonzalez-Guerra, E.; Tapia Osorio, A.; Angeles-Castellanos, M.; Buijs, R.M. |
| Title |
Circadian disruption leads to loss of homeostasis and disease |
Type |
Journal Article |
| Year |
2011 |
Publication |
Sleep Disorders |
Abbreviated Journal |
Sleep Disord |
| Volume |
2011 |
Issue |
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Pages |
964510 |
| Keywords |
Human Health |
| Abstract |
The relevance of a synchronized temporal order for adaptation and homeostasis is discussed in this review. We present evidence suggesting that an altered temporal order between the biological clock and external temporal signals leads to disease. Evidence mainly based on a rodent model of “night work” using forced activity during the sleep phase suggests that altered activity and feeding schedules, out of phase from the light/dark cycle, may be the main cause for the loss of circadian synchrony and disease. It is proposed that by avoiding food intake during sleep hours the circadian misalignment and adverse consequences can be prevented. This review does not attempt to present a thorough revision of the literature, but instead it aims to highlight the association between circadian disruption and disease with special emphasis on the contribution of feeding schedules in circadian synchrony. |
| Address |
Departamento de Anatomia, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, 04360 Mexico City, DF, Mexico |
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English |
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2090-3553 |
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PMID:23471148; PMCID:PMC3581131 |
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no |
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LoNNe @ kagoburian @ |
Serial |
745 |
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| Author |
Smith, M.R.; Eastman, C.I. |
| Title |
Shift work: health, performance and safety problems, traditional countermeasures, and innovative management strategies to reduce circadian misalignment |
Type |
Journal Article |
| Year |
2012 |
Publication |
Nature and Science of Sleep |
Abbreviated Journal |
Nat Sci Sleep |
| Volume |
4 |
Issue |
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Pages |
111-132 |
| Keywords |
bright light; circadian rhythms; melatonin; night work; phase-shifting; sleep |
| Abstract |
There are three mechanisms that may contribute to the health, performance, and safety problems associated with night-shift work: (1) circadian misalignment between the internal circadian clock and activities such as work, sleep, and eating, (2) chronic, partial sleep deprivation, and (3) melatonin suppression by light at night. The typical countermeasures, such as caffeine, naps, and melatonin (for its sleep-promoting effect), along with education about sleep and circadian rhythms, are the components of most fatigue risk-management plans. We contend that these, while better than nothing, are not enough because they do not address the underlying cause of the problems, which is circadian misalignment. We explain how to reset (phase-shift) the circadian clock to partially align with the night-work, day-sleep schedule, and thus reduce circadian misalignment while preserving sleep and functioning on days off. This involves controlling light and dark using outdoor light exposure, sunglasses, sleep in the dark, and a little bright light during night work. We present a diagram of a sleep-and-light schedule to reduce circadian misalignment in permanent night work, or a rotation between evenings and nights, and give practical advice on how to implement this type of plan. |
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Biological Rhythms Research Laboratory, Rush University Medical Center, Chicago, IL, USA |
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English |
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1179-1608 |
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PMID:23620685; PMCID:PMC3630978 |
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no |
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IDA @ john @ |
Serial |
149 |
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