Effects of Mindfulness-Acceptance-Commitment-based intervention on psychological components and sport performance in bodybuilding sportsman

One of the most common and practical psychological interventions in the field of managing emotional states is mindfulness and acceptance-based interventions. The aim of this study was to investigate the effects of mindfulness-acceptance-commitment-based intervention on anger rumination, competitive anxiety, emotion dysregulation and sports performance in bodybuilding sportsman. The study was semi-experimental research that implemented in the form of a multiple baseline single-case design. The statistical population included all the athletes who went to the bodybuilding sport clubs in the city of Selseleh in Lorestan province in 2021. Among them 10 sportsmen who met the inclusion criteria were selected using convenience sampling method. The subjects participated individually in a 8 sessions of mindfulness and acceptance-based program. Data were interpreted using the visual inspection, reliable change index (RCI), non-overlapping data indices (PND, PAND, PEM), recovery rate index, and Cohen's D effect size. The results showed that mindfulness-acceptance-commitment-based intervention has led to a reduction in anger rumination, competitive anxiety, emotional dysregulation and an increase in sports performance in athletes. Findings of the present study show that mindfulness-acceptance-commitment-based interventions could be effective in improving the cognitive-emotional functions and sports performance of athletes, and its application along with physical exercises can improve their sports performance.