Background

Research has shown the effectiveness of sedentary behaviour interventions on reducing sedentary time. However, no systematic review has studied where the reduced sedentary time after such interventions is displaced to.

Objective

Our objective was to synthesize the evidence from interventions that have reduced sedentary behaviour and test the displacement of sedentary time into physical activity (light physical activity [LPA], moderate-to-vigorous physical activity [MVPA], standing, and stepping).

Methods

Two independent researchers performed a systematic search of the EBSCOhost, PubMed, Scopus, and Web of Science electronic databases. Meta-analyses were performed to examine the time reallocated from sedentary behaviour to physical activity during working time and the whole day in intervention trials (randomized/non-randomized controlled/non-controlled).

Results

A total of 36 studies met all the eligibility criteria and were included in the systematic review, with 26 studies included in the meta-analysis. Interventions showed a significant overall increase in worksite LPA (effect size [ES] 0.24; 95% confidence interval [CI] 0.05 to 0.43; P < 0.013) and daily LPA (ES 0.62; 95% CI 0.34 to 0.91; P = 0.001). A statistically significant increase in daily MVPA was observed (ES 0.47; 95% CI 0.26 to 0.67; P < 0.001). There was a significant overall increase in worksite standing time (ES 0.76; 95% CI 0.56 to 0.95; P < 0.001), daily standing time (ES 0.52; 95% CI 0.38 to 0.65; P < 0.001), and worksite stepping time (ES 0.12; 95% CI 0.04 to 0.20; P = 0.002).

Conclusions

Effective interventions aimed at reducing sedentary behaviour result in a consistent displacement of sedentary time to LPA and standing time, both at worksites and across the whole day, whereas changes in stepping time or MVPA are dependent on the intervention setting. Strategies to reduce sedentary behaviour should not be limited to worksite settings, and further efforts may be required to promote daily MVPA.

Trial Registration

PROSPERO registration number CRD42020153958.

中文翻译：

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时间去哪儿了？有效久坐行为干预中设备测量久坐时间的位移：系统评价和荟萃分析

背景

研究表明，久坐行为干预对减少久坐时间的有效性。然而，没有系统评价研究过此类干预措施后减少的久坐时间被转移到何处。

客观的

我们的目标是综合来自减少久坐行为的干预措施的证据，并测试将久坐时间转移到体力活动（轻度体力活动 [LPA]、中度到剧烈体力活动 [MVPA]、站立和踏步）。

方法

两位独立研究人员对 EBSCOhost、PubMed、Scopus 和 Web of Science 电子数据库进行了系统搜索。进行荟萃分析以检查在干预试验（随机/非随机对照/非对照）中工作时间和全天从久坐行为重新分配到身体活动的时间。

结果

共有 36 项研究符合所有资格标准并被纳入系统评价，其中 26 项研究被纳入荟萃分析。干预措施显示工地 LPA（效应大小 [ES] 0.24；95% 置信区间 [CI] 0.05 至 0.43； P  < 0.013）和每日 LPA（ES 0.62；95% CI 0.34 至 0.91；P  = 0.001）总体显着增加. 观察到每日 MVPA 有统计学意义的增加（ES 0.47；95% CI 0.26 至 0.67；P  < 0.001）。工地站立时间（ES 0.76；95% CI 0.56 至 0.95；P  < 0.001）、每日站立时间（ES 0.52；95% CI 0.38 至 0.65；P  < 0.001）和工地踏步时间（ ES 0.12；95% CI 0.04 至 0.20；P = 0.002)。

结论

旨在减少久坐行为的有效干预导致在工作场所和全天的久坐时间一致地转移到 LPA 和站立时间，而踏步时间或 MVPA 的变化取决于干预设置。减少久坐行为的策略不应仅限于工作场所，可能需要进一步努力促进每日 MVPA。

试用注册

PROSPERO 注册号 CRD42020153958。