Development of a fully automated, web-based, tailored intervention promoting regular physical activity among insufficiently active adults with @entity164 2 XXXX : integrating the I-change model, self-determination theory, and motivational interviewing components.

@entity1 @entity164 @entity6
BACKGROUND: Type 2 @entity6 is a major challenge for Canadian public health authorities, and regular physical activity is a key factor in the management of this disease. Given that fewer than half of @entity1 with @entity164 2 @entity6 in Canada are sufficiently active to meet the recommendations, effective programs targeting the adoption of regular physical activity (PA) are in demand for this population. Many researchers argue that Web-based, tailored interventions targeting PA are a promising and effective avenue for sedentary populations like Canadians with @entity164 2 @entity6 , but few have described the detailed development of this kind of intervention. OBJECTIVE: This paper aims to describe the systematic development of the Web-based, tailored intervention, Diab  te en Forme, promoting regular aerobic PA among adult Canadian francophones with @entity164 2 @entity6 . This paper can be used as a reference for health professionals interested in developing similar interventions. We also explored the integration of theoretical components derived from the I-Change Model, Self-Determination Theory, and Motivational Interviewing, which is a potential path for enhancing the effectiveness of tailored interventions on PA adoption and maintenance. METHODS: The intervention development was based on the program-planning model for tailored interventions of Kreuter et al. An additional step was added to the model to evaluate the intervention's usability prior to the implementation phase. An 8-week intervention was developed. The key components of the intervention include a self-monitoring tool for PA behavior, a weekly action planning tool, and eight tailored motivational sessions based on attitude, self-efficacy, intention, @entity164 of motivation, PA behavior, and other constructs and techniques. Usability evaluation, a step added to the program-planning model, helped to make several improvements to the intervention prior to the implementation phase. RESULTS: The intervention development cost was about CDN  59,700 and took approximately 54 full-time weeks. The intervention officially started on September 29, 2014. Out of 2300 potential @entity1 targeted for the tailored intervention, approximately 530 @entity1 visited the website, 170 @entity1 completed the registration process, and 83 corresponded to the selection criteria and were enrolled in the intervention. CONCLUSIONS: Usability evaluation is an essential step in the development of a Web-based tailored intervention in order to make pre-implementation improvements. The effectiveness and relevance of the theoretical framework used for the intervention will be analyzed following the process and impact evaluation. Implications for future research are discussed.
