Internet Technologies to Increase Exercise Behavior

描述(申请人提供)：多达75%的美国人不经常参加体育锻炼，25%的人完全不活动。在不运动的人中，患心血管疾病的风险几乎翻了一番，与收缩压升高、吸烟和血清胆固醇升高的风险相当。为了在人群水平上对体力活动流行率产生影响，研究必须集中在临床疗效试验和大规模传播研究之间的界面上。在这一界面上的研究必须将经过验证的干预措施与有可能接触到大量久坐不动的美国人的新创新进行比较。 这项研究的目的是确定干预传递渠道(定制互联网与定制印刷)对先前久坐不动的成年人的体力活动采用和维持的不同影响。据我们所知，还没有研究检验基于互联网的体力活动干预的效果。因此，我们将进行一项随机对照临床试验，比较三组：1)基于互联网的动机量身定制的个性化反馈(定制互联网)；2)基于印刷品的动机量身定制的个性化反馈(定制印刷)；以及3)目前对公众开放的网站(标准互联网对照组)。240名年龄在18-65岁之间的健康、久坐的女性和男性将被随机分配到三组中的一组。定制的互联网和定制的印刷手臂将在联系频率和内容上相匹配。数据将在基线、6个月和12个月时使用完善的体力活动和体能测量方法以及一套全面的心理社会问卷收集。我们的主要假设是，由于互联网功能的增强(例如，反馈的即时性和增强的图形)，被随机分配到定制互联网臂的个体在6个月和12个月时将表现出比定制打印臂中的个体更高的体力活动参与水平。此外，被随机分配到定制互联网或定制打印条件的受试者在6个月和12个月时的体力活动参与度将显著高于标准互联网比较条件下的受试者。其他感兴趣的问题将包括对干预-体力活动关系的潜在调解人和调解人的审查。这项研究将提供关于互联网和基于印刷的干预措施的相对有效性的重要信息，每一种干预措施都可用于广泛的公共卫生传播。

DESCRIPTION (provided by applicant): As many as 75 percent of Americans do not engage in regular physical activity and 25 percent are completely inactive. The risk of cardiovascular disease is almost doubled among people who are physically inactive, comparable to the risk associated with increased systolic blood pressure, cigarette smoking, and elevated serum cholesterol. To make an impact on physical activity prevalence at the population level, research must focus at the interface between clinical efficacy trials and large-scale dissemination studies. Studies at this interface must compare proven interventions with new innovations that have the potential to reach large numbers of sedentary Americans. The objective of this study is to determine the differential effect of intervention delivery channel (Tailored Internet versus Tailored Print) on physical activity adoption and maintenance in previously sedentary adults. To our knowledge, no studies have examined the efficacy of a Tailored Internet-based physical activity intervention. Thus, we will conduct a randomized controlled clinical trial comparing three groups, 1) Internet-based motivationally-tailored individualized feedback (Tailored Internet); 2) print-based motivationally-tailored individualized feedback which has previously shown to be efficacious (Tailored Print); and 3) websites currently available to the public (Standard Internet comparison group). Two hundred and forty healthy, sedentary women and men ages 18-65 will be randomly assigned to one of the three groups. The Tailored Internet and Tailored Print arms will be matched on frequency and content of contact. Data will be collected at baseline, 6, and 12 months using well-established physical activity and physical performance measures, as well as a comprehensive set of psychosocial questionnaires. Our primary hypothesis is that individuals randomized to the Tailored Internet arm will exhibit significantly higher levels of physical activity participation at 6 and 12 months than individuals in the Tailored Print arm due to the enhanced capabilities of the Internet (e.g., immediacy of feedback and enhanced graphics). And, in addition, subjects randomized to the Tailored Internet or Tailored Print conditions will exhibit significantly higher levels of physical activity participation at 6 and 12 months than those in the Standard Internet comparison condition. Other questions of interest will include an examination of potential moderators and mediators of the intervention-physical activity relationship. This study will contribute important information regarding the relative efficacy of Internet and print-based interventions, each of which can be utilized for widespread public health dissemination.