Table 1.

Overview of the self-regulation techniques implemented in the ‘MyDayPlan’ app

Self-regulation Technique	Implementation mode
Action planning	Participants are asked to formulate specific actions each morning to be more physically active during that day.
Barrier identification/problem solving (=coping planning)	Participants are asked to formulate specific barriers and possible solutions to overcome these barriers.
Reviewing goal achievement	Participants are asked to reflect on whether they executed their action plan. They are also asked to reflect on what helped to execute their action plan or on what hindered them to execute their action plan.