Table 2.

Methods and practical applications used in the intervention for the motivational phase.

Methods	Determinants	Practical applications
General information	Risk awareness	General information is provided in the form of short texts and slogans. In these texts and slogans, physical activity guidelines and health benefits of sufficient physical activity levels are highlighted.
	Outcome expectancies	Adults can read information about physical activity and select the information that they are interested in on a website. They can, for example, select to read information about positive outcomes due to sufficient physical activity levels or information about the benefits of increasing physical activity levels.
Monitoring, tailored feedback, and personal risk information	Risk awareness	After filling in a questionnaire about physical activity level, personal feedback is provided in which adults’ levels of physical activity are provided, as well as how these compare to the recommended level.
Tailored feedback and modelling	Preaction self-efficacy	The tailored feedback includes stories about peers who succeeded in increasing physical activity levels, also in difficult situations. For example, “Eric (40 years old) decided to be more physically active in his free time, by walking in the local park for 30 minutes, three times per week. When it was raining, Eric decided to go swimming instead of walking.”
Prompting identification of barriers and problem solving, and tailored feedback	Preaction self-efficacy	A predefined list of possible difficulties (barriers and risk situations) to increase physical activity level is provided and adults can select these difficulties that are applicable to them. Based on their answers, tailored information and tips for solutions to overcome the indicated barriers and risk situations are provided; adults can select those solutions to apply which they are confident about.