@Article{信息:doi 10.2196 / / jmir。8484，作者=“Vandelanotte, Corneel和Kolt, Gregory S和Caperchione, Cristina M和Savage, Trevor N和Rosenkranz, Richard R和Maeder, Anthony J和Van Itallie, Anetta和Tague, Rhys和Oldmeadow, Christopher和Mummery, W Kerry和Duncan, Mitch J”，标题=“Web 2.0干预在现实世界环境中增加身体活动的有效性:随机生态试验”，期刊=“J Med Internet Res”，年=“2017”，月=“11”，日=“13”，卷=“19”，数=“11”，页=“e390”，关键词=“互联网;在线;基于Web的;行为干预;外部效度;背景:将基于网络的体育活动干预研究转化为现实世界是缺乏的，并且变得越来越重要。目的:比较在现实环境中，传统的Web 1.0基于Web的身体活动干预(提供有限的交互性)与Web 2.0基于Web的身体活动干预(包含交互功能，如社交网络(即状态更新、在线“朋友”和个性化资料页面)、博客和谷歌地图混集)的使用和有效性。方法:自发注册免费10000步网站的成年人被随机分配到10000步网站(Web 1.0)或新开发的WALK 2.0网站(Web 2.0)。 Physical activity (Active Australia Survey), quality of life (RAND 36), and body mass index (BMI) were assessed at baseline, 3 months, and 12 months. Website usage was measured continuously. Analyses of covariance were used to assess change over time in continuous outcome measures. Multiple imputation was used to deal with missing data. Results: A total of 1328 participants completed baseline assessments. Only 3-month outcomes (224 completers) were analyzed due to high attrition at 12 months (77 completers). Web 2.0 group participants increased physical activity by 92.8 minutes per week more than those in the Web 1.0 group (95{\%} CI 28.8-156.8; P=.005); their BMI values also decreased more (--1.03 kg/m2, 95{\%} CI --1.65 to -0.41; P=.001). For quality of life, only the physical functioning domain score significantly improved more in the Web 2.0 group (3.6, 95{\%} CI 1.7-5.5; P<.001). The time between the first and last visit to the website (3.57 vs 2.22 weeks; P<.001) and the mean number of days the website was visited (9.02 vs 5.71 days; P=.002) were significantly greater in the Web 2.0 group compared to the Web 1.0 group. The difference in time-to-nonusage attrition was not statistically significant between groups (Hazard Ratio=0.97, 95{\%} CI 0.86-1.09; P=.59). Only 21.99{\%} (292/1328) of participants (n=292 summed for both groups) were still using either website after 2 weeks and 6.55{\%} (87/1328) were using either website after 10 weeks. Conclusions: The website that provided more interactive and social features was more effective in improving physical activity in real-world conditions. While the Web 2.0 website was visited significantly more, both groups nevertheless displayed high nonusage attrition and low intervention engagement. More research is needed to examine the external validity and generalizability of Web-based physical activity interventions. Trial Registration: Australian New Zealand Clinical Trials Registry: ACTRN12611000253909; https://anzctr.org.au /Trial/Registration/TrialReview.aspx?id=336588{\&}isReview=true (Archived by WebCite at http://www.webcitation.org/6ufzw 2HxD) ", issn="1438-8871", doi="10.2196/jmir.8484", url="//www.mybigtv.com/2017/11/e390/", url="https://doi.org/10.2196/jmir.8484", url="http://www.ncbi.nlm.nih.gov/pubmed/29133282" }