Newman et al. 2021, Atrial fibrillation in athletes meta-analysis

Systematic review and meta-analysis (British Journal of Sports Medicine). Athletes had about 2.5 times the odds of atrial fibrillation versus non-athlete controls (pooled OR 2.46, 95% CI 1.73-3.51). Athletes overall had elevated risk; the meta-regression found mixed-sport athletes had greater AF risk than endurance-sport athletes specifically. The absolute risk in an individual recreational runner remains low. Moderate.