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. 2023 Aug;46(4):642-654.
doi: 10.1007/s10865-022-00387-2. Epub 2023 Jan 12.

The relationship of daily physical activity and sleep in adults: variations by age, sex, and race

Alycia N S Bisson  1 , Margie E Lachman  2
Affiliations

The relationship of daily physical activity and sleep in adults: variations by age, sex, and race

Alycia N S Bisson et al. J Behav Med. 2023 Aug.

Abstract

Prior work suggests physical activity (PA) is related to quantity and quality of sleep. Questions remain regarding directionality, and whether relationships vary by age, sex, and race. We examined daily bidirectional associations between PA and sleep over one week. Participants were 427 adults from the MIDUS Biomarker study, with a mean age of 54.21 ± 11.67 (61% female, 30% non-white). PA (total activity) and sleep (total sleep time; TST and waking after sleep onset; WASO) were measured with an ActiWatch 64. Multilevel mixed-effects models showed differences in the relationships between PA and sleep by age, race, and sex. Following a day with increased PA, younger and nonwhite participants had significantly shorter TST. Days with higher PA were also associated with less WASO for younger participants. Bidirectional effects also emerged; following a night with shorter TST, men, not women, engaged in less next-day PA. Like other studies of daily PA and sleep, effect sizes were small. Future studies should assess potential mechanisms that could explain these demographic differences.

Keywords: Accelerometry; Aging; Gender; Health behavior.

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Conflict of interest statement

Conflicts of interest/Competing interests: All authors declare this research was conducted in the absence of any financial conflicts of interest.

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