What should I know about DNA Test Training?

DNA tests for training (e.g., ACTN3, ACE) analyze gene variants linked to muscle fiber type or endurance. However, effect sizes are small – a single SNP typically explains <1 % of performance variance. Training, nutrition, and recovery dominate. Most commercial tests overstate clinical relevance; DNA-based personalized training plans lack evidence. A test may serve as extra motivation but cannot replace professional coaching. Evidence grade: human-moderate (GWAS), but marketing exaggerates utility. Caveat: No randomized trials show superiority of DNA-guided training recommendations.