Self-Determination Theory Mechanisms in Men’s Long-Term, Objectively Measured Physical Activity and Sedentary Behavior in the European Fans in Training Program

(Journal article, journal of physical activity and health 2025)

Evidence supporting Self-Determination Theory (SDT) utility in facilitating and explaining physical activity (PA) behavior change and maintenance is robust and rapidly increasing. This paper aims to describe how SDT was used to develop the European Fans in Training program, and its adequacy, concerning the critical mechanisms theoretically provided, to predict objectively measured PA and sedentary behaviors.  Results confirm that interventions can create conditions for individuals to experience psychological need satisfaction, self-determined motivation, and PA-related health behavior change. These findings provide further support to the utility and acceptability of SDT among policymakers and practitioners wishing to promote PA in previously sedentary adults.