title: The time-of-day that breaks occur between consecutive duty periods affects the sleep strategies used by shiftworkers.
abstract: The aim of this study was to examine the sleep strategies used in breaks between consecutive shifts. For two weeks, 253 shiftworkers collected data regarding the timing of all shifts and sleeps. The final dataset included 395 between-shift breaks that had a standard duration (i.e. ~16 h). If a break included an entire night, participants had a single sleep on 80-93% of occasions, but if a break occurred predominantly during the daytime, participants had more than one sleep on 41-50% of occasions. These data indicate that the sleep strategy employed is influenced by the time-of-day that a break occurs.
authors.affiliation: a Appleton Institute for Behavioural Science , Central Queensland University , Adelaide , Australia.
authors.forename: Gregory D
authors.initials: GD
authors.lastname: Roach
authors.affiliation: a Appleton Institute for Behavioural Science , Central Queensland University , Adelaide , Australia.
authors.forename: Drew
authors.initials: D
authors.lastname: Dawson
authors.affiliation: b Department of Neurology , Northwestern University , Chicago , IL , USA.
authors.forename: Kathryn J
authors.initials: KJ
authors.lastname: Reid
authors.affiliation: a Appleton Institute for Behavioural Science , Central Queensland University , Adelaide , Australia.
authors.forename: David
authors.initials: D
authors.lastname: Darwent
authors.affiliation: a Appleton Institute for Behavioural Science , Central Queensland University , Adelaide , Australia.
authors.forename: Charli
authors.initials: C
authors.lastname: Sargent
mesh_terms: D000328:Adult; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D006801:Humans; D008124:Locomotion / Q000502:physiology; D008297:Male; D008875:Middle Aged; D010561:Personnel Staffing and Scheduling; D012890:Sleep / Q000502:physiology*; D013997:Time Factors; D014940:Work Schedule Tolerance / Q000502:physiology*
keywords: Activity monitor; locomotive engineer; monophasic; polyphasic; shiftwork; sleep diary; train driver; transport; volitional control; work diary