Yorkshire Quality and Safety Research Group, Bradford Institute for Health Research, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK.
Int J Behav Nutr Phys Act. 2011 Apr 11;8:29. doi: 10.1186/1479-5868-8-29.
Increased physical activity levels benefit both an individuals' health and productivity at work. The purpose of the current study was to explore the impact and cost-effectiveness of a workplace physical activity intervention designed to increase physical activity levels.
A total of 1260 participants from 44 UK worksites (based within 5 organizations) were recruited to a cluster randomized controlled trial with worksites randomly allocated to an intervention or control condition. Measurement of physical activity and other variables occurred at baseline, and at 0 months, 3 months and 9 months post-intervention. Health outcomes were measured during a 30 minute health check conducted in worksites at baseline and 9 months post intervention. The intervention consisted of a 3 month tool-kit of activities targeting components of the Theory of Planned Behavior, delivered in-house by nominated facilitators. Self-reported physical activity (measured using the IPAQ short-form) and health outcomes were assessed.
Multilevel modelling found no significant effect of the intervention on MET minutes of activity (from the IPAQ) at any of the follow-up time points controlling for baseline activity. However, the intervention did significantly reduce systolic blood pressure (B=-1.79 mm/Hg) and resting heart rate (B=-2.08 beats) and significantly increased body mass index (B=.18 units) compared to control. The intervention was found not to be cost-effective, however the substantial variability round this estimate suggested that further research is warranted.
The current study found mixed support for this worksite physical activity intervention. The paper discusses some of the tensions involved in conducting rigorous evaluations of large-scale randomized controlled trials in real-world settings.
增加身体活动水平有益于个人的健康和工作生产力。本研究的目的是探讨旨在提高身体活动水平的工作场所身体活动干预措施的影响和成本效益。
共有 1260 名参与者来自 44 个英国工作场所（基于 5 个组织内）被招募到一项群组随机对照试验中，工作场所被随机分配到干预组或对照组。在基线、0 个月、3 个月和 9 个月的干预后，测量身体活动和其他变量。在基线和干预后 9 个月在工作场所进行的 30 分钟健康检查中测量健康结果。干预措施包括一个针对计划行为理论组成部分的 3 个月工具包活动，由指定的促进者在内部提供。使用 IPAQ 短表自我报告身体活动（测量）和健康结果。
多层次建模发现，在控制基线活动的情况下，干预对 IPAQ 中活动的代谢当量分钟数在任何随访时间点都没有显著影响。然而，与对照组相比，干预确实显著降低了收缩压（B=-1.79 毫米汞柱）和静息心率（B=-2.08 次），并显著增加了体重指数（B=.18 单位）。干预措施被发现没有成本效益，但是围绕这个估计值的很大的可变性表明需要进一步研究。
本研究对这种工作场所身体活动干预措施提供了混合支持。本文讨论了在真实环境中进行大规模随机对照试验的严格评估中涉及的一些紧张局势。
