Questions people ask about Sportgene Check

A sport gene check (e.g., ACTN3, BDNF, FADS2) can reveal genetic predispositions for muscle fiber type, recovery, or nutrient metabolism. However, predictive power is limited: the ACTN3 R577X polymorphism (rs1815735) is the best-studied marker for sprint/power performance – RR carriers tend to have more fast-twitch fibers on average. The effect size is small and easily overshadowed by training, diet, and recovery. Other genes (e.g., BDNF Val66Met) show only weak associations with metabolic adaptations. MyBody-X tests are screening tools, not diagnostic. Evidence for personalized training recommendations from a single gene is weak to moderate. A holistic approach (blood biomarkers, microbiome, lifestyle) is more informative. Beware of marketing claims that derive a 'sport recommendation' from one SNP – that is not scientifically supported.