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Workplace Sitting and Height-Adjustable Workstations

A Randomized Controlled Trial
  • Maike Neuhaus
    Correspondence
    Address correspondence to: Maike Neuhaus, MPsych, Cancer Prevention Research Centre, School of Population Health, The University of Queensland, Herston Rd, Herston, Queensland, Australia 4006
    Affiliations
    Cancer Prevention Research Centre, School of Population Health, The University of Queensland, Herston, Queensland
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  • Genevieve N. Healy
    Affiliations
    Cancer Prevention Research Centre, School of Population Health, The University of Queensland, Herston, Queensland

    Baker IDI Heart and Diabetes Institute, Melbourne, Victoria
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  • David W. Dunstan
    Affiliations
    Cancer Prevention Research Centre, School of Population Health, The University of Queensland, Herston, Queensland

    Baker IDI Heart and Diabetes Institute, Melbourne, Victoria

    Epidemiology and Preventive Medicine, Melbourne, Victoria

    School of Sports Science, Exercise and Health, University of Western Australia, Perth, Western Australia, Australia
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  • Neville Owen
    Affiliations
    Cancer Prevention Research Centre, School of Population Health, The University of Queensland, Herston, Queensland

    Baker IDI Heart and Diabetes Institute, Melbourne, Victoria

    Central Clinical School, Monash University, Melbourne, Victoria

    School of Population and Global Health, University of Melbourne, Melbourne, Victoria
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  • Elizabeth G. Eakin
    Affiliations
    Cancer Prevention Research Centre, School of Population Health, The University of Queensland, Herston, Queensland

    Baker IDI Heart and Diabetes Institute, Melbourne, Victoria
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      Background

      Desk-based office employees sit for most of their working day. To address excessive sitting as a newly identified health risk, best practice frameworks suggest a multi-component approach. However, these approaches are resource intensive and knowledge about their impact is limited.

      Purpose

      To compare the efficacy of a multi-component intervention to reduce workplace sitting time, to a height-adjustable workstations-only intervention, and to a comparison group (usual practice).

      Design

      Three-arm quasi-randomized controlled trial in three separate administrative units of the University of Queensland, Brisbane, Australia. Data were collected between January and June 2012 and analyzed the same year.

      Setting/participants

      Desk-based office workers aged 20–65 (multi-component intervention, n=16; workstations-only, n=14; comparison, n=14).

      Intervention

      The multi-component intervention comprised installation of height-adjustable workstations and organizational-level (management consultation, staff education, manager e-mails to staff) and individual-level (face-to-face coaching, telephone support) elements.

      Main outcome measures

      Workplace sitting time (minutes/8-hour workday) assessed objectively via activPAL3 devices worn for 7 days at baseline and 3 months (end-of-intervention).

      Results

      At baseline, the mean proportion of workplace sitting time was approximately 77% across all groups (multi-component group 366 minutes/8 hours [SD=49]; workstations-only group 373 minutes/8 hours [SD=36], comparison 365 minutes/8 hours [SD=54]). Following intervention and relative to the comparison group, workplace sitting time in the multi-component group was reduced by 89 minutes/8-hour workday (95% CI=−130, −47 minutes; p<0.001) and 33 minutes in the workstations-only group (95% CI=−74, 7 minutes, p=0.285).

      Conclusions

      A multi-component intervention was successful in reducing workplace sitting. These findings may have important practical and financial implications for workplaces targeting sitting time reductions.

      Clinical Trial Registration

      Australian New Zealand Clinical Trials Registry 00363297
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