Abstract
Objectives
This study aimed to investigate the association of sleep regularity with time spent
in sedentary behavior (SB) and physical activity (PA) in adults with full-time jobs.
Methods
This was a cross-sectional study. Adults aged 21-64 years with full-time jobs were
recruited between August 2019 and December 2020 in Taiwan. The time spent in SB/PA
was assessed using triaxial accelerometers (Actigraph wGT3x-BT), and PA was further
classified into light-intensity physical activity (LPA) and moderate-to-vigorous intensity
physical activity (MVPA). Each participant recorded their daily sleep patterns and
work hours in a log, which was further used to measure sleep variability and social
jet lag. Linear regression was applied to examine the associations of indicators of
sleep regularity with SB time and PA time.
Results
A total of 192 adults (men = 28.13%; mean age = 38.56 ± 8.89 years) were included
in this study. After adjusting for potential covariates, greater social jet lag was
related to more SB time (unstandardized coefficient [B] = 14.39, P = .005) and less LPA time (B = −0.02, P = .010). No evidence of an association between other indicators of sleep regularity
with SB/PA time was found.
Conclusions
These results provide evidence for a relationship between sleep regularity and SB/PA
time in working adults. Maintaining regular sleep, especially a small social jet lag,
was suggested to promote physical activity and avoid a sedentary lifestyle. Future
research is recommended to examine work-related influences on the associations and
bidirectional relationship between sleep regularity and SB/PA.
Keywords
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Article info
Publication history
Published online: November 28, 2022
Accepted:
October 5,
2022
Received in revised form:
September 19,
2022
Received:
March 27,
2022
Identification
Copyright
© 2022 National Sleep Foundation. Published by Elsevier Inc. All rights reserved.
