Criteria for determining Olympic eligibility vary by sport and generally include an athlete's age, nationality, and achievement in qualifying events. Athletes may need to meet specific performance standards set by their respective federations. For certain sports, adherence to anti-doping regulations is crucial, ensuring athletes do not violate fair play ethics. Additionally, national Olympic committees play roles in endorsing athletes based on their performance and potential. This multi-layered structure ensures that all athletes participating represent the spirit of competition and excellence inherent in the Olympics.