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A cluster randomized controlled trial to reduce office workers' sitting time: impact on activity outcomes

Healy, Genevieve N., Eakin, Elizabeth G., Owen, Neville, LaMontagne, Anthony D., Moodie, Marj, Winkler, Elisabeth A. H., Fjeldsoe, Brianna S., Wiesner, Glen, Willenberg, Lisa and Dunstan, David W. 2016, A cluster randomized controlled trial to reduce office workers' sitting time: impact on activity outcomes, Medicine & science in sports & exercise, vol. 48, no. 9, pp. 1787-1797, doi: 10.1249/MSS.0000000000000972.

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Title A cluster randomized controlled trial to reduce office workers' sitting time: impact on activity outcomes
Author(s) Healy, Genevieve N.
Eakin, Elizabeth G.
Owen, Neville
LaMontagne, Anthony D.ORCID iD for LaMontagne, Anthony D. orcid.org/0000-0002-5811-5906
Moodie, Marj
Winkler, Elisabeth A. H.
Fjeldsoe, Brianna S.
Wiesner, Glen
Willenberg, Lisa
Dunstan, David W.
Journal name Medicine & science in sports & exercise
Volume number 48
Issue number 9
Start page 1787
End page 1797
Total pages 11
Publisher Wolters Kluwer
Place of publication Philadelphia, Pa.
Publication date 2016-09
ISSN 0195-9131
1530-0315
Keyword(s) workplace
cardiometabolic biomarkers
accelerometry
sedentary
physical activity
Summary PURPOSE: To evaluate, compared to usual practice, the initial and long-term effectiveness of a workplace intervention targeting reducing sitting on activity outcomes.

METHODS: Office worksites (≥1km apart) from a single organization in Victoria, Australia were cluster randomized to intervention (n=7) or control (n=7). Participants were 231 desk-based office workers (5 to 39 participants per worksite) working at least 0.6 full time equivalent. The workplace-delivered intervention addressed organizational, physical environment, and individual behavioural change to reduce sitting time. Assessments occurred at baseline, three-, and 12-months, with the primary outcome participants' objectively measured (activPAL3 device) workplace sitting time (mins/8-h workday). Secondary activity outcomes were: workplace time spent standing, stepping (light, moderate-vigorous and total) and in prolonged (≥30min) sitting bouts (h/8-h workday); usual duration of workplace sitting bouts; and, overall sitting, standing and stepping time (mins/16-h day). Analysis was by linear mixed models, accounting for repeated measures and clustering and adjusting for baseline values and potential confounders.

RESULTS: At baseline, on average, participants (68% women; mean±SD age = 45.6±9.4 years) sat, stood and stepped for 78.8±9.5%, 14.3±8.2%, and 6.9±2.9% of work hours respectively. Workplace sitting time was significantly reduced in the intervention group compared to the controls at three months (-99.1 [95% CI -116.3 to -81.8] min/8-h workday) and 12 months (-45.4 [-64.6 to -26.2] min/8-h workday). Significant intervention effects (all favoring intervention) were observed for standing, prolonged sitting, and usual sitting bout duration at work, as well as overall sitting and standing time, with no significant nor meaningful effects observed for stepping.

CONCLUSIONS: This workplace-delivered multicomponent intervention was successful at reducing workplace and overall daily sitting time in both the short- and long- term.
Language eng
DOI 10.1249/MSS.0000000000000972
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
1106 Human Movement And Sports Science
Socio Economic Objective 920499 Public Health (excl. Specific Population Health) not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, American College of Sports Medicine
Free to Read? No
Free to Read Start Date 2017-10-01
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084545

Document type: Journal Article
Collections: School of Exercise and Nutrition Sciences
Population Health
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Created: Thu, 30 Jun 2016, 13:09:34 EST

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