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Reducing Office Workers' Sitting Time at Work Using Sit-Stand Protocols: Results From a Pilot Randomized Controlled
Ingrid Li1, Martin G Mackey, Bridget Foley
1Department of Physiotherapy (Ms Li); The Faculty of Health Sciences (Ms Li, Dr Mackey, Dr Pappas, Dr Edwards, Dr Stamatakis); Prevention Research Collaboration, School of Public Health, Sydney Medical School, Charles Perkins Centre, University of Sydney (Dr Mackey, Ms Foley, Dr Pappas, Dr Edwards, Dr Chau, Dr Engelen, Dr Bauman, Dr Stamatakis); Primary Health Care Education and Research Unit, Research and Education Network (Ms Foley), Western Sydney Local Health District, Westmead; Health Promotion Unit, Sydney Local Health District (Dr Voukelatos, Dr Whelan); School of Public Health and Community Medicine, University of New South Wales (Dr Voukelatos, Dr Whelan), Sydney; School of Public Health, University of Queensland (Dr Winkler), Australia; Department of Epidemiology & Public Health, Institute of Epidemiology and Healthcare, University College London, London, UK (Dr Stamatakis).
Objective:
To examine the effects of different sit-stand protocols on work-time sitting and physical activity (PA) of office workers.
Methods:
Participants (n = 26, 77% women, mean age 42) were randomly allocated to usual sitting (control) or one of three sit-stand protocols (intervention) facilitated by height-adjustable workstations for a 4-week period between June and August 2015. Sitting, standing, and stepping time were assessed by inclinometry (activPAL); leisure-time physical activity (LTPA) by self-report. One-way analysis of covariance (ANCOVA) and post-hoc (Bonferroni) tests explored between-group differences.
Results:
Compared with baseline, intervention groups reduced work sitting time by 113 minutes/8-hour workday (95% confidence interval [CI] [-147,-79]) and increased work standing time by 96 minutes/8-hour workday (95% CI [67,125]) without significantly impacting LTPA/sleep time.
Conclusions:
Sit-stand protocols facilitated by height-adjustable workstations appear to reduce office workers' sitting time without significant adverse effects on LTPA.
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