ADVERTISEMENT
CURRENT ISSUE
JULY 2014
KINDLE EDITION



SEARCH JOURNAL ARCHIVES


SEARCH PUBMED


MANUSCRIPT SUBMISSIONS


SUBSCRIBE TO SLEEP

CONTINUING MEDICAL EDUCATION


ADVERTISE WITH US


ABOUT SLEEP

ABSTRACT SUPPLEMENTS


ACCEPTED PAPERS
Bookmark and Share         RSS Feed

VOLUME 29, ISSUE 01


Laboratory and Field Studies of Naps and Caffeine as Practical Countermeasures For Sleep-Wake Problems Associated With Night Work

Paula K. Schweitzer, PhD1; Angela C. Randazzo, PhD1; Kara Stone, MA1; Milton Erman, MD2; James K. Walsh, PhD1,3

1Sleep 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; 3Department of Psychology, St. Louis University, St. Louis, MO



  Expand  Table of Contents    
Text size:  

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.

Expand  Table of Contents
ADVERTISEMENT
Classifieds View SLEEP 2011 Poster Presentations Online