Development and evaluation of a self-regulation-based eHealth and mHealth intervention to promote physical activity: testing under controlled and real life conditions

To develop an enhanced electronic (e)Health or mobile (m)Health physical activity intervention, building on our current software platform. To determine the efficacy of the self-regulation components of the MyPlan 2.0 physical activity intervention, relative to a control condition, and to study the interaction with personal and contextual factors. To determine the effectiveness of the eHealth of mHealth physical activity intervention in an ecologically-valid setting, using a large RCT