Abstract：
Electronic health (eHealth) and mobile health (mHealth) could stimulate physical activity (PA) in a time-efficient and cost-effective way. This randomized controlled trial aims to investigate effects on moderate-to-vigorous PA (MVPA) of different combined computer- and mobile-based PA interventions targeted at adults aged 50 years and over. Participants (N = 954) were randomly allocated to a basic existing computer-based intervention (Active Plus [AP] or I Move [IM]) supplemented with one of three mobile elements being (1) activity tracker (AT), (2) ecological momentary intervention (EMI), or (3) chatbot (CB) or a control group (CG). MVPA was assessed via the SQUASH at baseline (T0), 3 months (T1), and 6 months (T2) and via accelerometers at T0 and T2. No intervention effects were found on objective (p = .502) and subjective (p = .368) MVPA for main research groups (AP/IM + AT, AP/IM + EMI, AP/IM + CB). Preliminary MVPA findings for subgroups (AP + AT, AP + EMI, AP + CB, IM + AT, IM + EMI, IM + CB) combined with drop-out data showed potential for the computer-based intervention AP with an integrated AT. Based on these preliminary findings, eHealth developers can be recommended to integrate ATs with existing computer-based PA interventions. However, further research is recommended to confirm the findings as a result of the exploratory nature of the subgroup analyses.
摘要：
电子健康（eHealth）和移动健康（mHealth）可以以具有时间效率和成本效益的方式刺激身体活动（PA）。这项随机对照试验旨在研究针对50岁及以上成年人的基于计算机和移动的不同联合PA干预措施对中度至重度PA（MVPA）的影响。参与者（N=954）被随机分配到基本的现有基于计算机的干预（ActivePlus[AP]或IMove[IM]），并补充了三个移动元素之一（1）活动跟踪器（AT），（2）生态瞬时干预（EMI），或（3）聊天机器人（CB）或对照组（CG）。在基线(T0)通过SQUASH评估MVPA，3个月（T1），和6个月（T2），并在T0和T2通过加速度计。对于主要研究组(AP/IM+AT，AP/IM+EMI,AP/IM+CB)。亚组的初步MVPA发现(AP+AT，AP+EMI,AP+CB,IM+AT,IM+EMI,IMCB）与退出数据相结合，显示出具有集成AT的基于计算机的干预AP的潜力。基于这些初步发现,可以建议eHealth开发人员将AT与现有的基于计算机的PA干预措施集成。然而,由于亚组分析的探索性,建议进一步研究以证实这些发现.
