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Laboratory and field studies of naps and caffeine as practical countermeasures for sleep-wake problems associated with night work.

Authors
Schweitzer-PK; Randazzo-AC; Stone-K; Erman-M; Walsh-JK
Source
Sleep 2006 Jan; 29(1):39-50
NIOSHTIC No.
20029431
Abstract
To evaluate the effects of napping, caffeine, and napping plus caffeine on performance and alertness in both laboratory and field settings. (1) Laboratory Study: parallel-groups design with random assignment to 1 of 4 experimental conditions. (2) Field Study: crossover design. Sleep laboratory and field settings. (1) Laboratory Study: 68 healthy individuals; (2) Field Study: 53 shiftworkers who worked nights or rotating shifts. (1) Laboratory Study: an evening nap opportunity before the first 2 of 4 consecutive simulated night shifts plus placebo taken all 4 nights, caffeine taken nightly, the combination of the nap and caffeine conditions, or placebo. (2) Field Study: an evening nap on the first 2 of 4 consecutive night shifts plus caffeine taken nightly versus placebo taken nightly without naps. (1) Laboratory Study: Napping, caffeine, and their combination all improved alertness and performance as measured by Maintenance of Wakefulness Test and Psychomotor Vigilance Task, but the combination of napping and caffeine was best in improving alertness. (2) Field Study: Napping plus caffeine improved performance as measured by Psychomotor Vigilance Test and decreased subjective sleepiness in individuals working the night shift. Napping plus caffeine helps improve performance and alertness of night-shift workers.
Keywords
Laboratory-testing; Sleep-deprivation; Sleep-disorders; Shift-work; Shift-workers; Simulation-methods; Workers; Work-performance
CODEN
SLEED6
Publication Date
20060101
Document Type
Journal Article
Email Address
schwpk@stlo.mercy.net
Funding Type
Grant
Fiscal Year
2006
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003966
Issue of Publication
1
ISSN
0161-8105
Source Name
Sleep
State
CA; MO
Performing Organization
UACS, Inc.
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