5. Discussion
The present study investigated the effectiveness of a school-based intervention in promoting anti-doping culture among adolescents, by targeting their perceptions of sport values, social norms and attitudes towards PES use in sports. This intervention is highly relevant to sport management, especially for managers working in the areas of recreational sports. More specifically, recreational sport managers can utilize our findings in order to develop interventions and information/ awareness-raising campaigns against doping use targeting young people. The European Fitness Code of Conduct on AntiDoping published by the European Health & Fitness Association (EHFA) recognizes that doping practices in fitness and amateur sport settings can be harmful to the integrity and public perception of the fitness sector. Thus, relevant campaigns and initiatives are needed to promote doping-free recreational sport, especially among young people (EHFA, 2012a).