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J Epidemiol. 2018 Oct 27. doi: 10.2188/jea.JE20180041. [Epub ahead of print]

Objectively-Assessed Patterns and Reported Domains of Sedentary Behavior Among Japanese Older Adults.

Author information

1
Faculty of Health and Sport Sciences, University of Tsukuba.
2
Faculty of Sport Sciences, Waseda University.
3
School of Arts and Letters, Meiji University.
4
Department of Preventive Medicine and Public Health, Tokyo Medical University.
5
Mary MacKillop Institute for Health Research, Australian Catholic University.
6
Behavioural Epidemiology Laboratory, Baker Heart and Diabetes Institute.
7
Swinburne University of Technology.

Abstract

BACKGROUND:

Prolonged periods of sitting time can be adversely associated with older adults' well-being and functional capacities. Understanding patterns and contexts of sedentary behaviors (SB) can inform approaches to prevention. This study examined Japanese older adults' objectively-assessed patterns and reported domains of SB and their interrelationships.

METHODS:

Participants (n = 297; aged 65-84 years) of this cross-sectional study wore an accelerometer for 7 days and completed a survey. Five measures related to SB patterns were identified from the accelerometer data. SB from six domains, socio-demographics, and chronic conditions were identified from the survey data. Relative contributions of six domains to objectively-measured prolonged sedentary time (≥30 minutes) and the number of breaks were examined in a series of multivariate linear regressions. Covariates were socio-demographics, chronic conditions, and accelerometer wear time.

RESULTS:

On average, participants spent 8.8 hours a day sedentary (58% of accelerometer wear time), with 7.6 breaks per sedentary hour, and 3.7 hours a day through prolonged sedentary bouts (4.4 time/day). The proportions of time in the SB domains were 9.4% for car, 4.0% for public transport, 6.1% for work, 45.5% for television (TV) viewing, 9.8% for computer use, and 25.1% for other leisure. Domains of SB that contributed significantly to longer sedentary time through prolonged bouts were TV viewing and computer use. TV viewing was also associated with a lesser number of breaks.

CONCLUSIONS:

For Japanese older adults, initiatives to address SB could focus on breaking-up prolonged periods of SB by encouraging more frequent breaks, especially during TV viewing.

KEYWORDS:

accelerometer; breaks; elderly; prolonged sitting

PMID:
30369510
DOI:
10.2188/jea.JE20180041
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