Experienced facilitators and challenges of practising motivational interaction: How can pre-service physical education teachers adopt more motivational behaviours?

Objectives: Health promotion professionals can contribute to high-quality motivation and sustained health behaviours, for example, physical activity (PA), using motivational interaction with their target groups. However, evidence shows that even after comprehensive training, professionals do not optimally adopt motivational counselling styles. To improve efforts to help professionals take up and sustain motivational interaction in their practice, we need a better understanding of influences on practising these styles.

Uptake of planning as a self-regulation strategy: Adolescents' reasons for (not) planning physical activity in an intervention trial.

Objectives: Planning is an effective self-regulation strategy. However, little is known why some people take up planning and some do not. Such understanding would help interventions to promote planning.

Acceptability, reach and implementation of a training to enhance teachers' skills in physical activity promotion.

Background: To achieve real-world impacts, behavior change interventions need to be scaled up and broadly implemented. Implementation is challenging however, and the factors influencing successful implementation are not fully understood. This study describes the nationwide implementation of a complex theory-based program targeting physical activity and sedentary behavior in vocational schools (Lets's Move It; LMI).

Thematic analysis of acceptability and fidelity of engagement for behaviour change interventions: The Let's Move It intervention interview study.

Objectives: Intervention participants' responses to and engagement with interventions are a key intermediate step between interventions and intended outcomes. The aim of this study was to qualitatively investigate crucial aspects of engagement, namely acceptability (experienced cognitive and emotional responses to the intervention), receipt (comprehension of intervention content), and skill enactment (skill performance in target settings), within the Let's Move It, a multi-component school-based physical activity intervention.

Design: A longitudinal qualitative study embedded in a cluster-randomized trial, with individual interviews of purposefully sampled intervention participants immediately post-intervention (n = 21) and at 14 months (n = 14).