Is FTO useful for Sport?

Based on the provided context, there is no information about FTO. In general, FTO variants (e.g., rs9939609) are associated with BMI and obesity risk, but their utility for sport performance is limited. The effect sizes are small, and lifestyle factors dominate. FTO alone does not predict athletic ability or response to training. Therefore, FTO is not considered useful for sport-related genetic testing in a meaningful, evidence-based way. Evidence is mixed: some GWAS show association with body composition, but no direct sport performance link. Sources: none from context.