Cancer Prevention Research Centre, School of Population Health, The University of Queensland, Brisbane, Queensland, Australia.
School of Human Movement Studies, The University of Queensland, Brisbane, Queensland, Australia.
Br J Sports Med. 2014 Jul;48(13):1037-42. doi: 10.1136/bjsports-2014-093524. Epub 2014 May 9.
To investigate how and when changes in workplace sitting time occurred following a workplace intervention to inform evaluation of intervention success.
The 4-week Stand Up Comcare study (June-September 2011) aimed to reduce workplace sitting time via regularly interrupting and replacing sitting time throughout the day. Activity monitor (activPAL3) workplace data from control (n=22) and intervention participants (n=21) were analysed. Differences in the number and usual duration of sitting bouts were used to evaluate how change occurred. To examine when change occurred, intervention effects were compared by hour since starting work and hour of the workday. Change in workplace activity (sitting, standing, stepping) was examined to further inform alignment with intervention messages. Individual variability was examined in how and when the change occurred.
Overall, behavioural changes aligned with intervention aims. All intervention participants reduced total workplace sitting time, though there was wide individual variability observed (range -29 to -262 min per 8 h workday). On average, intervention participants reduced number of sitting bouts (-4.6 bouts (95% CI -10.1 to 1.0), p=0.106) and usual sitting bout duration (-5.6 min (95% CI -9.8 to -1.4, p=0.011)) relative to controls. Sitting time reductions were observed across the workday, though intervention effects varied by hour of the day (p=0.015). The intervention group successfully adopted the Stand Up and Sit Less intervention messages across the day.
These analyses confirmed that this workplace intervention successfully modified sitting behaviour as intended (ie, fewer and shorter sitting bouts, with changes occurring throughout the day).
研究在一项工作场所干预措施实施后，工作场所久坐时间的变化方式和时间，以评估干预措施的效果。
为期 4 周的 Stand Up Comcare 研究（2011 年 6 月至 9 月）旨在通过在一天中定期打断和替换久坐时间来减少工作场所的久坐时间。使用活动监测器（activPAL3）对对照组（n=22）和干预组（n=21）的工作场所数据进行分析。通过比较每天开始工作后的小时数和工作日的小时数，来评估变化是如何发生的。为了检查变化发生的时间，比较了干预效果。还进一步检查了工作场所活动（坐、站、走）的变化，以更好地与干预信息保持一致。检查了个体变化的方式和时间。
总体而言，行为变化与干预目标一致。所有干预组参与者都减少了总工作场所久坐时间，但观察到个体间存在很大的差异（范围为每天 8 小时工作时间减少 29 至 262 分钟）。平均而言，与对照组相比，干预组参与者减少了坐的次数（-4.6 次（95%CI-10.1 至 1.0），p=0.106）和通常的坐的时间（-5.6 分钟（95%CI-9.8 至-1.4），p=0.011）。尽管干预效果因一天中的小时数而异（p=0.015），但全天都观察到了坐的时间减少。该干预组成功地在一天中采用了站立和减少久坐的干预信息。
这些分析证实，这项工作场所干预措施成功地改变了久坐行为，使其符合预期（即，坐的次数减少，时间缩短，变化发生在一天中）。
