@Article{信息:doi 10.2196 / / jmir。1629，作者=“Watson, Alice和Bickmore, Timothy和Cange, Abby和Kulshreshtha, Ambar和Kvedar, Joseph”，标题=“基于互联网的虚拟教练促进超重成年人坚持体育锻炼:随机对照试验”，期刊=“J Med Internet Res”，年=“2012”，月=“Jan”，日=“26”，卷=“14”，数=“1”，页=“e1”，关键词=“活动监测;计步器;肥胖;身体质量指数;远程医疗;远程保健"，摘要="背景:解决肥胖流行病需要制定有效的、可扩展的干预措施。计步器和基于网络的程序对提高运动水平是有益的，但可以通过增加非人类指导来增强。目的:我们假设虚拟教练可以通过步数增加超重或肥胖个体的活动水平，而不仅仅是使用计步器和网站观察到的效果。方法:我们从波士顿大都市区招募了70名体重指数(BMI)在25至35 kg/m2之间的参与者。 Participants were assigned to one of two study arms and asked to wear a pedometer and access a website to view step counts. Intervention participants also met with a virtual coach, an automated, animated computer agent that ran on their home computers, set goals, and provided personalized feedback. Data were collected and analyzed in 2008. The primary outcome measure was change in activity level (percentage change in step count) over the 12-week study, split into four 3-week time periods. Major secondary outcomes were change in BMI and participants' satisfaction. Results: The mean age of participants was 42 years; the majority of participants were female (59/70, 84{\%}), white (53/70, 76{\%}), and college educated (68/70, 97{\%}). Of the initial 70 participants, 62 completed the study. Step counts were maintained in intervention participants but declined in controls. The percentage change in step count between those in the intervention and control arms, from the start to the end, did not reach the threshold for significance (2.9{\%} vs --12.8{\%} respectively, P = .07). However, repeated measures analysis showed a significant difference when comparing percentage changes in step counts between control and intervention participants over all time points (analysis of variance, P = .02). There were no significant changes in secondary outcome measures. Conclusions: The virtual coach was beneficial in maintaining activity level. The long-term benefits and additional applications of this technology warrant further study. Trial Registration: ClinicalTrials.gov NCT00792207; http://clinicaltrials.gov/ct2/show/NCT00792207 (Archived by WebCite at http://www.webcitation.org/63sm9mXUD) ", issn="1438-8871", doi="10.2196/jmir.1629", url="//www.mybigtv.com/2012/1/e1/", url="https://doi.org/10.2196/jmir.1629", url="http://www.ncbi.nlm.nih.gov/pubmed/22281837" }