Reflections and insights on a mindfulness, acceptance, and commitment-based (MAC) intervention with complementary Self-Determination Theory (SDT) principles delivered by a coach

This paper presents a case of implementing a MAC-based intervention, empowered by SDT principles, delivered by the coach. As the MAC-based approach becomes dominant in the sport psychology field and SDT is a leading motivational approach applied to sports coaching, a 10-session program was delivered by the head coach to a group of 28 gymnasts. The intervention included psychoeducation on core MAC principles (e.g., values, acceptance, defusion) and was guided by the coach's efforts to fulfill the basic psychological needs of autonomy, competence, and relatedness. The intervention program protocol aligned with the coach's reflections are presented in each session. In conclusion, despite some constraints, this intervention framework holds potential for contributing to youth athletes' performance, well-being, and psychological development.