积极建议提高体育活动智能手机干预的有效性卡塔尔世界杯8强波胆分析随机对照试验%A Skvortsova,Aleksandrina %A Cohen Rodrigues,Talia %A de buisonj，David %A Kowatsch,Tobias %A Santhanam,Prabhakaran %A Veldhuijzen,Dieuwke S %A van Middendorp,Henriët %A Evers,Andrea %+麦吉尔大学心理学系，加拿大蒙特利尔penfield博士大道1205号，H3A 1B1，加拿大，14386303664，a.skvortsova@fsw.leidenuniv.nl %K电子健康%K移动健康%K身体活动%K步行%K积极建议%K结果预期%K手机%D 2022 %7 1.3.2022 %9背景:电子健康干预具有增加用户身体活动的潜力。然而，它们的效果各不相同，而且往往只有短期效果。提高其有效性的一种可能方法是通过向用户提供有关干预有效性的积极建议来提高他们对积极结果的期望。研究表明，当个体对各种干预措施抱有积极期望时，他们往往会从这些干预措施中获益更多。目的:这项基于网络的研究的主要目的是调查积极的建议是否可以改变参与者对智能手机体育活动干预有效性的期望，并随后增加参与者在干预期间采取的步数。此外，我们还研究了建议是否会影响应用的感知有效性、应用的参与度、自我报告的活力和参与者的疲劳程度。方法:这项研究包括一个为期21天的全自动身体活动干预，旨在帮助参与者多走几步。干预是通过一个基于智能手机的应用程序进行的，该应用程序向参与者发送特定的任务(例如，设定活动目标或寻找社会支持)，并记录他们每天的步数。 Participants were randomized to either a positive suggestions group (69/133, 51.9%) or a control group (64/133, 48.1%). Positive suggestions emphasizing the effectiveness of the intervention were implemented in a web-based flyer sent to the participants before the intervention. Suggestions were repeated on days 8 and 15 of the intervention via the app. Results: Participants significantly increased their daily step count from baseline compared with 21 days of the intervention (t107=−8.62; P<.001) regardless of the suggestions. Participants in the positive suggestions group had more positive expectations regarding the app (B=−1.61, SE 0.47; P<.001) and higher expected engagement with the app (B=3.80, SE 0.63; P<.001) than the participants in the control group. No effects of suggestions on the step count (B=−22.05, SE 334.90; P=.95), perceived effectiveness of the app (B=0.78, SE 0.69; P=.26), engagement with the app (B=0.78, SE 0.75; P=.29), and vitality (B=0.01, SE 0.11; P=.95) were found. Positive suggestions decreased the fatigue of the participants during the 3 weeks of the intervention (B=0.11, SE 0.02; P<.001). Conclusions: Although the suggestions did not affect the number of daily steps, they increased the positive expectations of the participants and decreased their fatigue. These results indicate that adding positive suggestions to eHealth physical activity interventions might be a promising way of influencing subjective but not objective outcomes of interventions. Future research should focus on finding ways of strengthening the suggestions, as they have the potential to boost the effectiveness of eHealth interventions. Trial Registration: Open Science Framework 10.17605/OSF.IO/CWJES; https://osf.io/cwjes %M 35230245 %R 10.2196/32130 %U //www.mybigtv.com/2022/3/e32130 %U https://doi.org/10.2196/32130 %U http://www.ncbi.nlm.nih.gov/pubmed/35230245