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Laboratory and field studies of naps and caffeine as practical countermeasures for sleep-wake problems associated with night work.
Sleep. 2006 Jan; 29(1):39-50.S

Abstract

STUDY OBJECTIVES

To evaluate the effects of napping, caffeine, and napping plus caffeine on performance and alertness in both laboratory and field settings.

DESIGN

(1) Laboratory Study: parallel-groups design with random assignment to 1 of 4 experimental conditions. (2) Field Study: crossover design.

SETTING

Sleep laboratory and field settings.

PARTICIPANTS

(1) Laboratory Study: 68 healthy individuals; (2) Field Study: 53 shiftworkers who worked nights or rotating shifts.

INTERVENTIONS

(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.

MEASUREMENTS AND RESULTS

(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.

CONCLUSIONS

Napping plus caffeine helps improve performance and alertness of night-shift workers.

Links

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Authors+Show Affiliations

Schweitzer PK
Sleep Medicine and Research Center affiliated with St. John's Mercy Medical Center and St. Luke s Hospital, St. Louis, MO; 2Pacific Sleep Medicine, La Jolla, CA 63017, USA. schwpk@stlo.mercy.net
Randazzo AC
No affiliation info available
Stone K
No affiliation info available
Erman M
No affiliation info available
Walsh JK
No affiliation info available

MeSH

AdolescentAdultAgedArousalCaffeineCentral Nervous System StimulantsCircadian RhythmCross-Over StudiesDisorders of Excessive SomnolenceFemaleHumansLaboratoriesMaleMiddle AgedOccupational DiseasesPsychomotor PerformanceReaction TimeSleepSleep Disorders, Circadian Rhythm

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

16453980

Clinical Trial Links

Effect of Naps on Decision Making of Residents.

Citation

Schweitzer, Paula K., et al. "Laboratory and Field Studies of Naps and Caffeine as Practical Countermeasures for Sleep-wake Problems Associated With Night Work." Sleep, vol. 29, no. 1, 2006, pp. 39-50.
Schweitzer PK, Randazzo AC, Stone K, et al. Laboratory and field studies of naps and caffeine as practical countermeasures for sleep-wake problems associated with night work. Sleep. 2006;29(1):39-50.
Schweitzer, P. K., Randazzo, A. C., Stone, K., Erman, M., & Walsh, J. K. (2006). Laboratory and field studies of naps and caffeine as practical countermeasures for sleep-wake problems associated with night work. Sleep, 29(1), 39-50.
Schweitzer PK, et al. Laboratory and Field Studies of Naps and Caffeine as Practical Countermeasures for Sleep-wake Problems Associated With Night Work. Sleep. 2006;29(1):39-50. PubMed PMID: 16453980.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Laboratory and field studies of naps and caffeine as practical countermeasures for sleep-wake problems associated with night work. AU - Schweitzer,Paula K, AU - Randazzo,Angela C, AU - Stone,Kara, AU - Erman,Milton, AU - Walsh,James K, PY - 2006/2/4/pubmed PY - 2006/4/15/medline PY - 2006/2/4/entrez SP - 39 EP - 50 JF - Sleep JO - Sleep VL - 29 IS - 1 N2 - STUDY OBJECTIVES: To evaluate the effects of napping, caffeine, and napping plus caffeine on performance and alertness in both laboratory and field settings. DESIGN: (1) Laboratory Study: parallel-groups design with random assignment to 1 of 4 experimental conditions. (2) Field Study: crossover design. SETTING: Sleep laboratory and field settings. PARTICIPANTS: (1) Laboratory Study: 68 healthy individuals; (2) Field Study: 53 shiftworkers who worked nights or rotating shifts. INTERVENTIONS: (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. MEASUREMENTS AND RESULTS: (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. CONCLUSIONS: Napping plus caffeine helps improve performance and alertness of night-shift workers. SN - 0161-8105 UR - https://www.unboundmedicine.com/medline/citation/16453980/Laboratory_and_field_studies_of_naps_and_caffeine_as_practical_countermeasures_for_sleep_wake_problems_associated_with_night_work_ L2 - https://academic.oup.com/sleep/article-lookup/doi/10.1093/sleep/29.1.39 DB - PRIME DP - Unbound Medicine ER -