Abstract
BackgroundProlonged sedentary time is associated with adverse health outcomes, after controlling for the role of moderate-to-vigorous physical activity. We previously reported on a four-week randomized trial using a sit-stand desk (SSD) intervention that decreased sedentary time at work without changing activity level during non-work hours.PurposeThe purpose of this study was to measure the impact of the SSD on sitting time and activity level one year after the original intervention.MethodsA pre-post design was used where the control period from the original study was regarded as “pre” and the measurements made in the follow-up study as “post.” The follow-up study was conducted in the same office workers over a two-week period in June 2013.ResultsFifteen out of the 23 participants took part in the follow-up study. Self-reported sitting time during work-hours was decreased by 22% (95% CI: 15% to 29%; p < 0.001), replaced almost entirely by standing. Activity measured by Gruve accelerometer during work-hours were significantly higher in the one-year follow-up period compared to baseline (+24,748 AU/h; 95% CI: 7150 to 42,347; p < 0.01). Sedentary time during work-hours was decreased by 0.77 min per work-hour (95% CI: −1.88 to 0.33 min/h; p = 0.17). Qualitative findings through focus group sessions suggested the workers had overall favorable experiences with the SSDs without negatively impacting productivity.ConclusionOne year following the original intervention, participants continue to have increased activity and decreased sedentary time at work with the use of SSDs.
Highlights
Prolonged sedentary time is associated with adverse health outcomes, after controlling for moderate-to-vigorous physical activity, with the possible exception of extreme levels of PA (> 35 METS per week) (Bankoski et al, 2011; Ekelund et al, 2016; Finni et al, 2014; Hamilton et al, 2007; Owen et al, 2010)
In this 1-year follow-up from the end of the original study, a prepost design was used where the control period from the original study was regarded as “pre” and the measurements made in the follow-up study was regarded as “post.” The follow-up study was conducted in the same group of office workers at the same company in the Twin Cities Metro Area, MN, USA (Caldrea, Inc.) over a two-week period in June 2013
It is important to determine whether sitstand desk (SSD) will continue to be used, and influence activity levels, well past the originally planned trial period
Summary
Prolonged sedentary time is associated with adverse health outcomes, after controlling for moderate-to-vigorous physical activity, with the possible exception of extreme levels of PA (> 35 METS per week) (Bankoski et al, 2011; Ekelund et al, 2016; Finni et al, 2014; Hamilton et al, 2007; Owen et al, 2010). We have previously reported a randomized cross-over study evaluating use of adjustable sit-stand desk (SSD) in the workplace to reduce sitting time and replace sedentary activity with light (non-exercise) activity (Dutta et al, 2014). We previously reported on a four-week randomized trial using a sitstand desk (SSD) intervention that decreased sedentary time at work without changing activity level during nonwork hours. Purpose: The purpose of this study was to measure the impact of the SSD on sitting time and activity level one year after the original intervention. Conclusion: One year following the original intervention, participants continue to have increased activity and decreased sedentary time at work with the use of SSDs
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