Aim: To investigate the role of implicit theories of ability and achievement goals on self-handicapping strategies in physical education classes.Hypotheses: It was expected that incremental theories of ability would be negatively associated with self-handicapping strategies, whereas fixed theories of ability would enhance pupils' self-reported use of such strategies. It was also hypothesised that low perceived competence would reinforce self-handicapping among pupils holding fixed theories of ability and an ego goal orientation.Method: A cross-sectional study of 9th graders in Norway (N=343; 166 boys and 177 girls) was conducted in which pupils responded to a questionnaire measuring sub-dimensions of fixed and incremental theories of ability, achievement goal orientations, perceived competence and self-handicapping in physical education.Results: Regression-based path analyses revealed that a fixed theory of ability had a direct positive effect on self-handicapping. The effects of an incremental implicit theory of ability on self-handicapping were negative and mediated by a task orientation. High perceived competence was found to buffer the aversive affect of holding a stable theory of ability on self-handicapping.Conclusion: The findings illustrate the importance of studying implicit motivational beliefs in physical education classes in order to provide an understanding of self-handicapping strategies among pupils.