Doping use is an emerging threat in the field of amateur and fitness sports, and adolescents and young adults represent particularly vulnerable populations. Previous EU projects have shown that the existing infrastructure and education against doping in fitness/amateur sports in Europe is very limited, and concerted efforts are needed to effectively tackle doping use in these settings and among young people. The proposed project (Strengthening the Anti-doping fight in Fitness and Exercise in YOUth – SAFE YOU) aims to address this need by developing a European-wide strategic partnership between academic institutions and sports organizations, in order to empower and strengthen the fight against doping use in youth in fitness and amateur sports. Our consortium will work together with adolescents and young adults in order to develop an innovative, web-based education tool (SAFE YOU Tool) against doping. This web-based tool will target adolescents and young people, and will be used as an educational resource for anti-doping interventions and educational campaigns by educators, policy-makers and other relevant stakeholders in the fight against doping in fitness/amateur sports.The objectives of Project SAFE YOU are to: 1. Identify the key risk and protective factors for doping substance use in adolescent and young athletes involved in fitness and amateur sports.2. Assess the lived experiences of young people involved in fitness and amateur sports settings, especially in relation to availability/access, promotion and purchase of doping substances. 3. Co-create with adolescent and young amateur athletes an evidence-based, online education tool against doping in fitness and amateur sports.4. Develop a ‘train the trainers’ approach to teach educators and other professionals and stakeholders how to use the SAFE YOU Tool to effectively design, implement and evaluate anti-doping interventions and educational campaigns for young people in fitness/amateur sports.