Exploring when and how adolescents sit: cross-sectional analysis of activPAL-measured patterns of daily sitting time, bouts and breaks

Arundell, Lauren, Salmon, Jo, Koorts, Harriet, Contardo Ayala, Ana Maria and Timperio, Anna 2019, Exploring when and how adolescents sit: cross-sectional analysis of activPAL-measured patterns of daily sitting time, bouts and breaks, BMC public health, vol. 19, pp. 1-9, doi: 10.1186/s12889-019-6960-5.

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Title Exploring when and how adolescents sit: cross-sectional analysis of activPAL-measured patterns of daily sitting time, bouts and breaks
Author(s) Arundell, LaurenORCID iD for Arundell, Lauren orcid.org/0000-0002-8178-4104
Salmon, JoORCID iD for Salmon, Jo orcid.org/0000-0002-4734-6354
Koorts, HarrietORCID iD for Koorts, Harriet orcid.org/0000-0003-1303-6064
Contardo Ayala, Ana Maria
Timperio, AnnaORCID iD for Timperio, Anna orcid.org/0000-0002-8773-5012
Journal name BMC public health
Volume number 19
Article ID 653
Start page 1
End page 9
Total pages 9
Publisher BioMed Central
Place of publication London, Eng.
Publication date 2019-06-11
ISSN 1471-2458
Keyword(s) ActivPAL
Bouts, prolonged sitting
Sedentary behaviour
Sedentary breaks
Sex differences
Science & Technology
Life Sciences & Biomedicine
Public, Environmental & Occupational Health
Prolonged sitting
Summary BACKGROUND: This study describes patterns of adolescents' objectively-measured sitting volume, sitting bouts, and breaks in sitting during different days and periods of the day, and explored differences by sex and weekdays versus weekend days. METHODS: ActivPAL™ data were collected in August 2014-December 2015 from adolescents attending secondary government schools in Melbourne Australia. Eight periods (early morning, mid-morning, morning break, late morning, lunch, early afternoon, late-afternoon and evening) were extracted for each day. School time, class time and out-of-school time were also extracted for weekdays. The percentage of time sitting, percentage of each hour in prolonged sitting (sitting bout ≥10 min), and number of sitting breaks/hour were calculated for each period. Differences by sex, and week and weekend days were determined using t-tests. RESULTS: Participants (n = 297, 15.4 ± 1.6 years) spent 68% of their day sitting; ~ 30% of each hour in prolonged sitting and 3.1 sitting breaks/hour. Sitting time was greater during class time (75%) and school (70%) compared to out-of-school time (65%). Sitting patterns differed between week and weekend days for all periods except the evening period. Girls had higher proportion of sitting during class than boys (76% vs 72% respectively) and school hours (72% vs 67%), more prolonged sitting during school hours (27% vs 23%), and more sitting breaks per hour during out-of-school time (2.6 vs 2.4), but fewer during class (2.5 vs 3.3) and school hours (2.7 vs 3.3). Sitting patterns did not differ by sex on weekend days. CONCLUSIONS: Adolescents spent two-thirds of their waking hours sitting, with distinct patterns on weekdays and weekend days. Even though boys and girls were exposed to the same school day routine, girls spent more time sitting and had fewer sitting breaks. Class times, school breaks and the evening period were identified as key intervention periods. Further research is needed to understand the behavioural differences, and guide future intervention design.
Language eng
DOI 10.1186/s12889-019-6960-5
Indigenous content off
Field of Research 1117 Public Health and Health Services
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2019, The Author(s)
Persistent URL http://hdl.handle.net/10536/DRO/DU:30122695

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