Testing Psychological Mechanisms to Promote Physical Activity in Adults

申请1 R 01 AG 051723 -01的重新提交寻求5年的资金，以进行随机对照， 一项随机对照试验（RCT）旨在测试一种名为AgingPLUS的多组分干预措施的有效性。AgingPLUS目标阴性- 对老龄化的积极看法（NVOA），低控制信念，以及缺乏目标规划作为一组风险因素， 健康老龄化具体来说，我们将研究是否使成年人的NVOA更积极，加强 他们的个人控制信念和目标规划将导致身体活动（PA）的增加。PA被选为 感兴趣的结果行为，因为它是最好的非药理学，非侵入性，最具成本效益， 有效的健康促进方法。拟议的研究解决了几个至关重要的问题，以indi- 和整个社会。首先，该项目扩展了大量的证据表明，NVOA，低控制 信仰，以及糟糕的目标规划使成年人无法参与促进健康的行为，包括参与- 在PA。其次，该项目还响应了干预方案的呼吁， 这些动机因素削弱了成年人以更健康的方式变老的能力。最后，该项目解决了关键问题， 关于长期保持积极行为改变的问题。该项目有三个 具体目标： 1.进行一项随机试验，以检查AgingPLUS计划的有效性。采用随机 采用社会接触控制组的单盲前后测设计，我们将检查成年人的NVOA， 个人控制信念和目标规划可以在4周的干预过程中得到改善， 克 2.测试干预效果的潜在机制的概念模型。因为部分- AgingPLUS组中的裤子将在他们完成干预后练习自我定义的PA目标， 我们将使用加速度计和日常活动日志来评估他们的PA。使用多个中介模型，我们 将检查是否改善NVOA，控制信念，和目标规划是假定的机制，有利于 改变了PA。我们假设NVOA、控制信念和目标规划的改善 在第8周后测时，将是干预和PA之间关联的重要中介。 3.进行6个月随访，以检查AgingPLUS的长期效果。我们将进行6- 一个月的随访，并使用多层次模型来描述参与者在所有4次的变化轨迹 的评估。此外，我们将研究间歇性监测参与者的PA是否有助于 保持积极的生活方式。这一目的是检查干预的自然时间进程 影响，为AgingPLUS计划的下一个发展阶段提供信息。

This resubmission of application 1 R01 AG051723-01 seeks 5 years of funding to conduct a randomized con- trolled trial (RCT) to test the efficacy of a multi-component intervention called AgingPLUS. AgingPLUS targets neg- ative views on aging (NVOA), low control beliefs, and deficient goal-planning as a cluster of risk factors for un- healthy aging. Specifically, we will examine whether making adults' NVOA more positive and strengthening their personal control beliefs and goal planning will result in increases in physical activity (PA). PA is chosen as the outcome behavior of interest because it is the best non-pharmacological, non-invasive, and most cost-ef- fective method of health promotion. The proposed study addresses several issues of critical importance to indi- viduals and society at large. First, the project extends a large body of evidence showing that NVOA, low control beliefs, and poor goal-planning keep adults' from engaging in health-promoting behaviors, including engage- ment in PA. Second, the project also responds to calls for intervention programs that address attitudinal and motivational factors that undermine adults' ability to age in healthier ways. Finally, the project addresses critical issues with regard to the long-term maintenance of positive behavior change. The proposed project has three specific aims: 1. To conduct a randomized trial to examine the efficacy of the AgingPLUS program. Using a randomized single-masked pretest-posttest design with a social contact control group, we will examine if adults' NVOA, personal control beliefs, and goal planning can be improved over the course of a 4-week intervention pro- gram. 2. To test a conceptual model of the mechanisms underlying the intervention effects. Because partici- pants in the AgingPLUS group will practice a self-defined PA goal after they have completed the intervention, we will use accelerometry and daily activity logs to assess their PA. Using a multiple mediator model, we will examine if improved NVOA, control beliefs, and goal planning are the putative mechanisms that pro- duced the change in PA. We hypothesize that improvements in NVOA, control beliefs, and goal planning will be significant mediators of the association between the intervention and PA at the Week 8 posttest. 3. To conduct a 6-months follow-up to examine the long-term effects of AgingPLUS. We will conduct a 6- month follow-up and use multilevel modeling to describe participants' change trajectories across all 4 times of assessment. In addition, we will examine if intermittent monitoring of participants' PA facilitates the maintenance of a physically active lifestyle. This aim examines the natural time course of the intervention effects to inform the next stage of development of the AgingPLUS program.