The relation of age to the adjustment of the circadian rhythms of oral temperature and sleepiness to shift work

Härmä, Mikko; Knauth, Peter; Ilmarinen, Juhani; Ollila, H. M.

doi:10.1016/0003-6870(91)90137-7

Cited by 3 publications

(4 citation statements)

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“…This hypothesis has been addressed in several ways. Harma, et al (level 4) 101 initially found no effect of age on CBT phase-shifting or nighttime sleepiness, but in a later study, found that, after three nights, older workers showed less circadian adaptation and were more sleepy (level 2). 102 More recently, Monk et al (level 2), 103 in a laboratory study, found that older subjects (67-87 years old) phase-shifted more readily in a delay direction than in an advance direction; in this regard, older subjects were similar to younger subjects.…”

Section: Agementioning

confidence: 98%

Circadian Rhythm Sleep Disorders: Part I, Basic Principles, Shift Work and Jet Lag Disorders

Sack

Auckley²,

Auger

et al. 2007

Sleep

559

367

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Section: Agementioning

confidence: 98%

Circadian Rhythm Sleep Disorders: Part I, Basic Principles, Shift Work and Jet Lag Disorders

Sack

Auckley²,

Auger

et al. 2007

Sleep

559

367

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show abstract

“…It is possible that these results stem from the fact that night workers are already adapted to working at night, since, as suggested by Harma (24) and Costa (3), there is a kind of natural selection in which those who face serious health problems and difficulty to adapt to this kind of work schedule tend to be referred to daytime work. Even though there is evidence that aging is associated with certain circumstances that might impair the adaptation to night work or shift work (17,19,25), one should also consider an overlap between aging and the accumulation of experiences, as stressed by Costa (15). For some individuals, the passing of time certainly comes along with the learning of personal strategies that enable them to better cope with night work.…”

Section: Discussionmentioning

confidence: 99%

“…One factor of aging is the decreased ability to perform circadian adjustments (15). The combination of these processes has been considered to play an important role in the even greater reduction in the quality and duration of daytime sleep observed among older shift workers when compared to their younger colleagues (15)(16)(17)(18)(19).…”

mentioning

confidence: 99%

Sleep, ageing and night work

Pires

Teixeira

Esteves

et al. 2009

Braz J Med Biol Res

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Studies have shown that the frequency or worsening of sleep disorders tends to increase with age and that the ability to perform circadian adjustments tends to decrease in individuals who work the night shift. This condition can cause consequences such as excessive sleepiness, which are often a factor in accidents that occur at work. The present study investigated the effects of age on the daytime and nighttime sleep patterns using polysomnography (PSG) of long-haul bus drivers working fixed night or day shifts. A total of 124 drivers, free of sleep disorders and grouped according to age ( ± 5.64%); P ≤ 0.05], which was greater in younger drivers. These findings are inconsistent with the notion that older night workers are more adversely affected than younger night workers by the challenge of attempting to rest during the day.

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“…Specifically, older shift workers experience an increase in sleep disruption19-24 and a reduction in the ability of circadian rhythms to readjust to new schedules 20. However, there are few publications on whether the increased sleep disruption in older shift workers results in subsequent deficits in performance above those typically reported 3…”

mentioning

confidence: 99%

Comparing performance on a simulated 12 hour shift rotation in young and older subjects

Reid

Dawson

2001

Occup Environ Med

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Objectives-To simulate a 12 hour shift rotation and measure the diVerence in performance if any, between older and younger subjects. Significant reductions in neurobehavioural performance during shift work and particularly night work have long been recognised. There are conflicting reports of the eVects of 12 hour shifts on performance, alertness, and safety. Furthermore, research suggests that older shift workers have more sleep disruption and maladaption to shift work. When this is combined with longer hours at work there may be considerable reductions in performance for older compared with younger workers. Methods-Thirty two subjects were allocated to groups according to age. Group one had 16 subjects with a mean (SD) age of 21.2 (2.7) years, and group two had 16 subjects with a mean (SD) age of 43.9 (6.8) years. Subjects came to the laboratory for six consecutive days and completed a simulated 12 hour shift rotation consisting of two 12 hour day shifts (0700-1900), followed by two 12 hour night shifts (1900-0700). During the work period subjects completed a computer administered neurobehavioural performance task every hour. Results-Performance for the older subjects was consistently lower than for the younger subjects. There was a significant diVerence in performance across the shift between older and younger subjects. There was a significant change in performance across the shifts in the older subjects, such that performance significantly increased across the day shifts and decreased across the night shifts. By contrast, the younger subjects were able to maintain performance across both day shifts and the second night shift. Conclusions-There are significant diVerences in performance of older and younger subjects during a simulated 12 hour shift rotation. Future studies both in the field and the laboratory would be useful in determining whether this is typical and if there are any important consequences for the older worker on 12 hour shifts. (Occup Environ Med 2001;58:58-62)

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The relation of age to the adjustment of the circadian rhythms of oral temperature and sleepiness to shift work

Cited by 3 publications

References 0 publications

Circadian Rhythm Sleep Disorders: Part I, Basic Principles, Shift Work and Jet Lag Disorders

Circadian Rhythm Sleep Disorders: Part I, Basic Principles, Shift Work and Jet Lag Disorders

Sleep, ageing and night work

Comparing performance on a simulated 12 hour shift rotation in young and older subjects

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