Digital health has grown from a collection of provocative ideas into a multibillion-dollar industry in just over a decade in part because of the promise of this technology for improving physical activity monitoring and promotion strategies. Systematic reviews and meta-analyses of evidence for this technology are beginning to accumulate.1 2 In this commentary, we offer some important considerations as the field moves towards creating personalised strategies for promoting physical activity. First, apps and wearable trackers are often portrayed as tools for promoting physical activity, but, by themselves, they are not treatments. They are simply vehicles for delivering the psychologically active ingredients of behaviour change, akin to the capsule that encloses pharmacologically active agents in medication. Physicians do not prescribe medication based on the delivery vehicle alone; they consider the mechanism of dysfunction to target, active ingredients in the drug and dosing to inform treatments. It is inappropriate to conclude that digital tools promote positive changes in activity; poorly designed interventions deployed via digital modes are no more than a digital placebo—they lack a defined target or active ingredient but are delivered in a shiny new capsule. Second, between-group differences in treatment and control groups are …

中文翻译：

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迈向个性化体育活动推广数字工具的步骤

在短短十多年的时间里，数字健康已经从一系列具有争议性的想法发展成为一个价值数十亿美元的产业，部分原因是这项技术有望改善身体活动监测和促进策略。针对该技术的证据的系统审查和荟萃分析正在开始积累。1 2 在本评论中，随着该领域朝着创建促进身体活动的个性化策略的方向发展，我们提供了一些重要的考虑因素。首先，应用程序和可穿戴追踪器通常被描述为促进身体活动的工具，但它们本身并不是治疗方法。它们只是传递行为改变的心理活性成分的载体，类似于将药理活性剂封装在药物中的胶囊。医生不会仅根据输送工具开药；他们考虑了靶向功能障碍的机制、药物中的活性成分和剂量，以指导治疗。得出数字工具促进活动积极变化的结论是不恰当的；通过数字模式部署的设计不佳的干预措施只不过是数字安慰剂——它们缺乏明确的目标或活性成分，但以闪亮的新胶囊形式提供。其次，治疗组和对照组的组间差异是……