期刊
JOURNAL OF ADOLESCENT HEALTH
卷 48, 期 6, 页码 566-571出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jadohealth.2010.08.012
关键词
Actigraphy; Sleep; HPA axis; Cortisol; Diurnal rhythms; Adolescence; Naturalistic; Diary studies
资金
- William T. Grant Scholars Award
- Institute for Policy Research
- NIMH [R01 MH65652]
- School of Social and Family Dynamics
Purpose: To examine how hours of sleep and wake times relate to between-person differences and day-today changes in diurnal cortisol rhythms in late adolescence. Methods: Older adolescents (N = 119) provided six cortisol samples (wakeup, +30 minutes, +2 hours, +8 hours, +12 hours, and bedtime) on each of three consecutive days while wearing an actigraph. We examined how average (across 3 days) and day-to-day changes in hours of sleep and wake times related to diurnal cortisol patterns. Results: On average, more hours of sleep related to steeper decline in cortisol across the days. Day-to-day analyses revealed that the hours of sleep of the previous night predicted steeper diurnal slopes the next day, whereas greater waking cortisol levels and steeper slopes predicted more hours of sleep and a later wake time the next day. Conclusion: Our results suggest a bidirectional relationship between sleep and hypothalamic-pituitary-adrenal axis activity. (C) 2011 Society for Adolescent Health and Medicine. All rights reserved.
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