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Feasibility of a real-time self-monitoring device for sitting less and moving more: A randomised controlled trial

Research output: Contribution to journalArticle

  • Anne Martin
  • Jacob Matthew Adams
  • Christopher Bunn
  • Jason M.R. Gill
  • Cindy M. Gray
  • Kate Hunt
  • Douglas J. Maxwell
  • Hidde P van der Ploeg
  • Sally Wyke
  • Nanette Mutrie

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Original languageEnglish
Article numbere000285
Pages (from-to)1-10
JournalBMJ open sport & exercise medicine
Early online date11 Oct 2017
Publication statusE-pub ahead of print - 11 Oct 2017


Objectives: Time spent inactive and sedentary are both associated with poor health. Self-monitoring of walking, using pedometers for real-time feedback, is effective at increasing physical activity. This study evaluated the feasibility of a new pocket-worn sedentary time and physical activity real-time self-monitoring device (SitFIT™).
Methods: Forty sedentary men were equally randomized into two intervention groups. For four weeks, one group received a SitFIT™ providing feedback on steps and time spent sedentary (lying/sitting); the other group received a SitFIT™ providing feedback on steps and time spent upright (standing/stepping). Change in sedentary time, standing time, stepping time and step count was assessed using activPAL™ monitors at baseline, and 4-week (T1) and 12-week (T2) follow-up. Semi-structured interviews were conducted after 4 and 12 weeks.
Results: The SitFIT™ was reported as acceptable and usable, and seen as a motivating tool to reduce sedentary time by both groups. On average, participants reduced their sedentary time by 7.8 minutes/day (95%CI -55.4, 39.7) (T1) and by 8.2 minutes/day (95%CI -60.1, 44.3) (T2). They increased standing time by 23.2 minutes/day (95%CI 4.0, 42.5) (T1) and 16.2 minutes/day (95%CI -13.9, 46.2) (T2). Stepping time was increased by 8.5 minutes/day (95%CI 0.9, 16.0) (T1) and 9.0 minutes/day (95%CI 0.5, 17.5) (T2). There were no between-group differences at either follow-up time points.
Conclusion: The SitFIT™ was perceived as a useful tool for self-monitoring of sedentary time. It has potential as a real-time self-monitoring device to reduce sedentary and increase upright time.

    Research areas

  • sedentary behaviour, SitFIT™, feasibility, user trial, device, self-monitoring, sitting

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