HeartSteps: a Just-in-Time Adaptive Intervention for Increasing Physical Activity Amongst Sedentary Adults.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 44
- 主要终点
- 30 minute step count
研究概览
简要总结
The aim of this research is to evaluate the efficacy of contextually tailored activity suggestions and activity planning for increasing physical activity among sedentary adults.
详细描述
Physical activity is a key behavioral strategy for prevention of non-communicable diseases such as diabetes and heart disease. Mobile health (mHealth) interventions have shown promise for supporting physical activity adoption and maintenance in ways that are highly acceptable to users, scalable, and cost-efficient. This study examines two intervention strategies-contextually tailored activity suggestions and daily planning of the activity for the next day-that a mobile health intervention can use to encourage physical activity in sedentary adults.
Study participants use HeartSteps, an mHealth physical intervention developed by the research team, in their daily lives for six weeks. Over the course of the study both of the HeartSteps intervention components-contextually-tailored activity suggestions and activity planning-are micro-randomized for each participant on each of the day of the study, in order the effects on physical activity of each component separately and how those effects change over time.
The primary hypothesis for suggestions is that providing a contextually tailored activity suggestion increases participant step count over the subsequent 30 minutes following message delivery.
The first secondary hypothesis for suggestions is that the proximal effect of the contextually tailored activity suggestions on the subsequent 30-minute step count will decrease with duration in the study.
The primary hypothesis for planning is that receiving evening planning will increase step count on the following day.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 60 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •English speakers,
- •between 18 and 60 years of age,
- •could walk for exercise without discomfort, and
- •either had a full-time daytime job or a regular schedule outside the home (e.g., students)
- •have a personal phone running Android 5.0 or higher or willing to use a study-provided phone as their primary phone for the duration of the study.
排除标准
- •Need medical supervision to exercise
- •Currently using an activity tracker (e.g., FitBit)
研究组 & 干预措施
HeartSteps intervention
For activity suggestions, at each available decision time, each participant is randomly assigned to either receive an activity suggestion or not. The randomization probability is 0.6 for receiving a message and 0.4 for not receiving a message.
For activity planning, at each decision point, the participant is randomized to either receive evening planning or not at that decision time. The randomization probability for receiving planning is 0.5, and 0.5 for not receiving planning.
干预措施: HeartSteps: A just-in-time adaptive intervention for increasing physical activity amongst sedentary adults. (Behavioral)
结局指标
主要结局
30 minute step count
时间窗: 30 minutes
30-minute window after each available decision point
Daily step count
时间窗: 24 hour day
Daily step count on the day following treatment
次要结局
- Thumbs up/down(30-minute window while message is available)