Finnish Institute for Health and Welfare, Helsinki, FINLAND.
Department of Biostatistics, University of Turku and Turku University Hospital, Turku, FINLAND.
Med Sci Sports Exerc. 2021 Aug 1;53(8):1756-1765. doi: 10.1249/MSS.0000000000002627.
The randomized controlled trial REACT (NCT03320746) examined the effect of a 12-month consumer-based activity tracker intervention on accelerometer-measured physical activity among recent retirees.
Altogether 231 recently retired Finnish adults (age, 65.2 ± 1.1 yr, mean ± SD; 83% women) were randomized to intervention and control groups. Intervention participants were requested to wear a commercial wrist-worn activity tracker (Polar Loop 2; Polar, Kempele, Finland) for 12 months, to try to reach the daily activity goals shown on the tracker display, and to upload their activity data to a Web-based program every week. The control group received no intervention. Accelerometer-based outcome measurements of daily total, light physical activity (LPA), and moderate to vigorous (MVPA) physical activity were conducted at baseline and at 3-, 6-, and 12-month time points. Hierarchical linear mixed models were used to examine the differences between the groups over time. All analyses were performed by intention-to-treat principle and adjusted for wake wear time.
The use of a commercial activity tracker did not increase daily total activity, LPA, or MVPA over the 12-months period when compared with nonuser controls (group-time interaction, P = 0.39, 0.23, and 0.77, respectively). There was an increase in LPA over the first 6 months in both the intervention (26 min·d-1, 95% confidence interval [CI] = 13 to 39) and the control (14 min·d-1, 95% CI = 1 to 27) groups, but the difference between the groups was not significant (12 min·d-1, 95% CI = -6 to 30). In both groups, LPA decreased from 6 to 12 months.
The 12-month use of a commercial activity tracker does not appear to elicit significant changes in the daily total activity among a general population sample of recent retirees, thus highlighting the need to explore other alternatives to increase physical activity in this target group.
随机对照试验 REACT（NCT03320746）研究了为期 12 个月的基于消费者的活动追踪器干预对最近退休的人群中计步器测量的身体活动的影响。
共有 231 名最近退休的芬兰成年人（年龄 65.2±1.1 岁，均值±标准差；83%为女性）被随机分为干预组和对照组。要求干预组参与者佩戴一款商用腕戴式活动追踪器（Polar Loop 2；Polar，Kempele，芬兰）12 个月，尝试达到追踪器显示的每日活动目标，并每周将活动数据上传到一个基于网络的程序。对照组未接受任何干预。在基线以及 3、6 和 12 个月时进行基于计步器的日常总活动、低强度身体活动（LPA）和中等到剧烈强度（MVPA）身体活动的测量。使用分层线性混合模型来检验组间随时间的差异。所有分析均按意向治疗原则进行，并根据清醒佩戴时间进行调整。
与非使用者对照组相比，在 12 个月期间，使用商用活动追踪器并没有增加日常总活动、LPA 或 MVPA（组间时间交互作用，P=0.39、0.23 和 0.77）。干预组和对照组在最初 6 个月内 LPA 均有所增加（干预组 26 分钟·天-1，95%置信区间[CI]为 13 至 39；对照组 14 分钟·天-1，95%CI 为 1 至 27），但两组之间的差异无统计学意义（12 分钟·天-1，95%CI 为 -6 至 30）。在两组中，LPA 均从 6 个月到 12 个月时下降。
在最近退休的一般人群样本中，使用商用活动追踪器 12 个月似乎不会显著改变日常总活动，因此需要探索其他增加该目标人群身体活动的替代方法。
