A Critical Review of Techniques Aiming at Enhancing and Sustaining Worker's Alertness during the Night Shift

Bonnefond, Anne; Tassi, Patricia; Rogé, Joceline; Muzet, Alain

doi:10.2486/indhealth.42.1

Cited by 44 publications

(26 citation statements)

References 99 publications

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“…Since there are some previous researches 33,34,49) suggesting that a nocturnal nap during night shift might disturb the following daytime sleep and nocturnal sleep, which might produce negative influences on alertness during the next night shift, the possible effects of the naps on physiological variables associated with daytime sleep and nocturnal sleep were analyzed with one-way repeated measures ANOVAs. Post-hoc analyses were performed using Tukey HSD tests to specify differences among the mean values.…”

Section: Discussionmentioning

confidence: 99%

“…In other countries, there has been growing interested in nocturnal napping, especially for airline pilots 27) , physicians 28) , nurses 28,29) , medical residents and interns 30) , industrial plant operators 31) , and aircraft maintenance engineers 32) . However, the most effective type of nocturnal nap has not yet been determined 33) . Only a few studies have investigated the timing and length of nocturnal naps.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Nap Length, Nap Timing and Sleep Quality on Sustaining Early Morning Performance

et al. 2007

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The study examined how nap length, nap timing and sleep quality affect early morning performance (6:00 to 8:00). Twelve students participated in a simulated nightshift schedule (22:00 to 8:00) where the length and timing of nocturnal naps were manipulated (0:00-1:00, 0:00-2:00, 4:00-5:00 and 4:00-6:00). A performance test battery was administered consisting of a psychomotor vigilance test, a logical reasoning test, and a visual analogue scale for subjective fatigue and sleepiness. The results showed that a 120-min nap sustained early morning performance better than a 60-min nap. Taking a nap earlier or later did not affect the neurobehavioral performance tests, although participants slept more efficiently during naps later in the night shift. A negative effect of a nocturnal nap during the night shift on subsequent daytime and nocturnal sleep was not observed in the sleep architecture. It still remains unclear whether slow wave sleep plays an important role in sustaining early morning performance. In terms of work safety and sleep health, the results suggest that a longer and later nap is beneficial during night shifts.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of Nap Length, Nap Timing and Sleep Quality on Sustaining Early Morning Performance

et al. 2007

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“…Short naps are frequently recommended as a strategy to minimise these effects (Å kerstedt, 2006;Bonneford et al, 2004;Schweitzer et al, 2006). Napping preceding night work has been demonstrated to be an effective countermeasure, both in laboratory studies and field settings (Dinges et al, 1987;Harma et al, 1989;Schweitzer et al, 1992Schweitzer et al, , 2006.…”

Section: Introductionmentioning

confidence: 99%

Scheduled napping as a countermeasure to sleepiness in air traffic controllers

Signal

Gander

Anderson³

et al. 2009

Journal of Sleep Research

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SUMMAR Y The aims of this study were to measure sleep during a planned nap on the night shift;and to use objective measures of performance and alertness to compare the effects of the nap opportunity versus staying awake. Twenty-eight air traffic controllers (mean age 36 years, nine women) completed four night shifts (two with early starts and two with late starts). Each type of night shift (early ⁄ late start) included a 40-min planned nap opportunity on one occasion and no nap on the other. Polysomnographic data were used to measure sleep and waking alertness [spectral power in the electroencephalogram (EEG) during the last hour of the night shift and the occurrence of slow rolling eye movements (SEMs) subsequent to the nap]. Psychomotor performance task [Psychomotor Vigilance Task (PVT)] was completed at the beginning and end of the shift, and after the nap (or an equivalent time if no nap was taken). Nap sleep latencies were relatively long (mean = 19 min) and total sleep time short (mean = 18 min), with minimal slow wave sleep (SWS, mean = 0%), and no rapid eye movement sleep. Nap sleep resulted in improved PVT performance (mean and slowest 10% of reaction time events), decreased spectral power in the EEG and reduced the likelihood of SEMs. The occurrence of SWS in the nap decreased spectral power in the EEG. This study indicates that although sleep taken at work is likely to be short and of poor quality it still results in an improvement in objective measures of alertness and performance.k e y w o r d s air traffic control, naps, neurophysiological alertness, night shift, psychomotor performance, within-subjects field study

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“…A direct countermeasure is arousing shiftworkers using environmental or pharmacological stimulants, although treating healthy shiftworkers with pharmaceutical products cannot be recommended without taking the risks associated with the treatment into consideration. Another countermeasure against SNS is time scheduling, such as avoiding too many successive night shifts, providing sufficient intervals between shifts, and providing enough possibilities for resting or napping on night shift 9) . However, it is sometimes difficult or impossible for shiftworkers or their managers to practice these countermeasures for reasons specific to each work site.…”

Section: Introductionmentioning

confidence: 99%

Correlates to Sleepiness on Night Shift among Male Workers Engaged in Three-shift Work in a Chemical Plant: Its Association with Sleep Practice and Job Stress

2011

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The purpose of this study was to examine the correlation of sleepiness during night shift (SNS) in male shiftworkers with nonpharmacological self-management (nPSM) practices to facilitate good day sleep, and also with job stress. Sleepiness on the job and possible correlates to SNS among 157 male shiftworkers in a rotating three-shift schedule at a chemical plant were cross-sectionally investigated using a self-administered questionnaire. Multivariate analyses revealed that SNS was positively associated with drinking alcoholic beverages before day sleep, but inversely associated with subjective health status, being of the evening type, abstaining from caffeine before day sleep, having a bath before day sleep, job control, reward from work, feeling suited to the job, and support from colleagues. SNS correlated with certain nPSM practices and also with possible modifiers of job stress. These findings provide clues to developing countermeasures against SNS among shiftworkers. The effects of nPSM practices and job stress management on their day sleep and SNS should be examined in detail.

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A Critical Review of Techniques Aiming at Enhancing and Sustaining Worker's Alertness during the Night Shift

Cited by 44 publications

References 99 publications

Impact of Nap Length, Nap Timing and Sleep Quality on Sustaining Early Morning Performance

Impact of Nap Length, Nap Timing and Sleep Quality on Sustaining Early Morning Performance

Scheduled napping as a countermeasure to sleepiness in air traffic controllers

Correlates to Sleepiness on Night Shift among Male Workers Engaged in Three-shift Work in a Chemical Plant: Its Association with Sleep Practice and Job Stress

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