What role does FOXO3 play in Sport?

FOXO3 is a transcription factor regulating stress resistance, autophagy, and DNA repair. In sports, FOXO3 is primarily linked to muscle atrophy and oxidative stress: intense exercise can activate FOXO3, promoting muscle breakdown, but it also plays a role in adaptive responses. Longevity studies associate certain FOXO3 variants with extended lifespan, indirectly suggesting benefits for recovery. However, direct evidence for performance enhancement is limited to mechanistic and observational data. A DNA test for FOXO3 alone does not provide actionable insights for athletic training or nutrition.