期刊
CHRONOBIOLOGY INTERNATIONAL
卷 29, 期 2, 页码 220-226出版社
TAYLOR & FRANCIS INC
DOI: 10.3109/07420528.2011.641045
关键词
Chronotype; Circadian rhythms; Lifestyle habit; Society; Spouse
资金
- Ministry of Education, Culture, Sports, and Technology of Japan
- Ministry of Health, Labour, and Welfare of Japan
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Grants-in-Aid for Scientific Research [21390335, 23770289, 22791161] Funding Source: KAKEN
Behavioral and physiological processes, such as sleep-wakefulness, thermoregulation, and hormone secretion, exhibit 24-h rhythms in most organisms. These biological rhythms are driven by the circadian clock system and are entrained by the external environment, which in the case of humans includes social time schedules. Couples might be ideal experimental subjects to discriminate between individual traits and environmental factors, as they share lifestyle habits but not genetic backgrounds. In this study, sleep timing was compared between married Japanese couples (n = 225) who had lived together for 1 yr or more (mean 17 yrs). Additionally, the authors evaluated the influence of individual traits and environmental factors on an individual's sleep timing per each couple. The results reveal that the sleep timings of a couple are mainly associated with the chronotypes of the husband and wife, whereas the sleep timings are significantly influenced by certain environmental factors. The findings suggest that chronotype remains one of the major determinants of an individual's sleep onset and wake times. Understanding an individual's chronotype may help improve the quality of life issues surrounding sleep. (Author correspondence: mishima@ncnp.go.jp)
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