Actigraphy suggests age-related differences in napping and nocturnal sleep

In Young Yoon, Daniel F. Kripke, Shawn Youngstedt, Jeffrey A. Elliott

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

The aim of this study was to contrast the time distribution of out-of-bed napping in young and older adults through recordings of wrist activity, and to evaluate the correlates of napping with nocturnal sleep. Seventy-three young adults between 18 and 32 years and 60 older adults between 60 and 75 years of age participated in the study. Subjects were selected for good general health and had few sleep complaints. They wore wrist-activity monitors and kept daily sleep logs for 1 week. Automatic sleep scoring was edited by the authors, supplemented by sleep logs and illumination data as well as activity data. Napping episodes were modestly increased in older adults, but there was no difference in the daily duration of napping. Older adults napped more in the evening (especially within 2 h before bedtime), whereas young adults napped more in the afternoon. The older adults with evening naps (n = 31) showed earlier nocturnal wakeup times and decreased nocturnal sleep duration compared with the older adults without evening naps (n = 29). There was no difference in nocturnal sleep between young adults with afternoon naps (n = 32) and without afternoon naps (n = 41). In determining the effects of napping on nocturnal sleep, timing of napping and age are important. Maintaining alertness during the evening (e.g. by bright light exposure or moderate exercise) would be a possible approach to delay wake-up times in older adults.

Original languageEnglish (US)
Pages (from-to)87-93
Number of pages7
JournalJournal of Sleep Research
Volume12
Issue number2
DOIs
StatePublished - Jun 2003
Externally publishedYes

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Actigraphy
Sleep
Young Adult
Wrist
Lighting
Exercise
Light

Keywords

  • Aging
  • Circadian
  • Naps
  • Sleep
  • Wrist activity

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology

Cite this

Actigraphy suggests age-related differences in napping and nocturnal sleep. / Yoon, In Young; Kripke, Daniel F.; Youngstedt, Shawn; Elliott, Jeffrey A.

In: Journal of Sleep Research, Vol. 12, No. 2, 06.2003, p. 87-93.

Research output: Contribution to journalArticle

Yoon, In Young ; Kripke, Daniel F. ; Youngstedt, Shawn ; Elliott, Jeffrey A. / Actigraphy suggests age-related differences in napping and nocturnal sleep. In: Journal of Sleep Research. 2003 ; Vol. 12, No. 2. pp. 87-93.
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