How are VDR and Sport related?

The vitamin D receptor (VDR) is encoded by the VDR gene and is crucial for calcium homeostasis, bone metabolism, and muscle function. In sports, VDR polymorphisms (e.g., rs2228570, rs1544410) have been associated with muscle strength, power, bone density, and injury risk. However, effect sizes are small, and actual vitamin D status (25(OH)D) plus training load are far more influential. While some studies suggest that athletes with certain VDR variants may benefit from higher vitamin D intake (e.g., for recovery or fracture prevention), the evidence is moderate at best – mostly observational or meta-analytic, with few RCTs directly testing genotype-guided supplementation for performance. MyBody-X DNA tests can detect these variants, but results should not be overinterpreted. A practical takeaway: ensure adequate vitamin D levels (especially in indoor or winter sports) regardless of genotype. The link between VDR and sport is real but nuanced; genetic testing adds a layer of personalization but is not a performance shortcut.