How are APOE and Sport related?

The relationship between APOE and sport is nuanced, revolving around the three common alleles (ε2, ε3, ε4) of the APOE gene. APOE is crucial for lipid transport and brain repair. The ε4 allele is consistently linked to a higher risk of concussion and poorer recovery after traumatic brain injury, which is especially relevant for contact sports. Some research also suggests ε4 carriers may have reduced aerobic capacity, though findings are mixed. Conversely, ε2 is sometimes associated with favorable lipid profiles and endurance potential, but effect sizes are small. Direct-to-consumer tests (e.g., MyBody-X) can report APOE genotype, but they cannot predict individual athletic performance or injury risk with certainty. The evidence is based on observational studies and meta-analyses, not interventional trials. Therefore, APOE results should be interpreted cautiously and integrated with clinical assessments. They are not a substitute for professional sports medicine advice. Evidence: human-moderate. Caveat: No validated performance or recovery prediction from consumer genetics.