No evidence of reciprocal associations between daily sleep and physical activity

Mitchell, Jonathan A., Godbole, Suneeta, Moran, Kevin, Murray, Kate, James, Peter, Laden, Francine, Hipp, J. Aaron, Kerr, Jacqueline, & Glanz, Karen (2016) No evidence of reciprocal associations between daily sleep and physical activity. Medicine and Science in Sports and Exercise, 48(10), pp. 1950-1956.

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Abstract

PURPOSE

  • To determine if physical activity patterns are associated with sleep later at night, and if nighttime sleep is associated with physical activity patterns the next day, among adult women.

METHODS

  • Women (N=353) living throughout the U.S. wore a wrist and a hip accelerometer for 7 days. Total sleep time (TST, hrs/night) and sleep efficiency (SE, %) were estimated from the wrist accelerometer; and moderate to vigorous physical activity (MVPA, >1040 counts per minute [cpm], hrs/d) and sedentary behavior (SB, <100 cpm, hrs/d) were estimated from the hip accelerometer. Mixed-effects models adjusted for age, race, body mass index (BMI), education, employment, marital status, health status, and hip accelerometer wear time were used to analyze the data. Follow-up analyses using quantile regression were used to investigate associations among women with below average TST and MVPA, and above average SB.

RESULTS

  • The average age of our sample was 55.5 (SD = 10.2) years. The majority of participants were white (79%) and married (72%), and half were employed full-time (49%). The participants spent on average 8.9 and 1.1 hours per day in SB and MVPA, respectively, and 6.8 hours per night asleep. No associations were observed between MVPA and SB with nighttime TST or SE. There were no associations between nighttime TST and SE with MVPA or SB the next day. The findings were the same in the quantile regression analyses.

CONCLUSION

  • In free-living adult women, accelerometry-estimated nighttime sleep and physical activity patterns were not associated with one another. Based on our observational study involving a sample of adult women, higher physical activity will not necessarily improve sleep at night on a day-to-day basis (and vice versa).

Impact and interest:

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ID Code: 98510
Item Type: Journal Article
Refereed: Yes
Keywords: accelerometry, actigraphy, female, sedentary behavior
DOI: 10.1249/MSS.0000000000001000
ISSN: 0195-9131
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Psychology & Counselling
Copyright Owner: 2016 American College of Sports Medicine
Deposited On: 31 Aug 2016 22:32
Last Modified: 06 Oct 2016 05:35

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