Elliott AD, Linz D, Mishima R, et al. - Using the UK Biobank cohort, researchers examined the link between self-reported physical activity and atrial fibrillation (AF), ventricular arrhythmias and bradyarrhythmias among 402,406 people (52.5% female), aged 40–69 years, with over 2.8 million person-years of follow-up. At baseline, participants were assessed for self-reported physical activity, calculated in metabolic equivalent-minutes per week. The study sample had undergone detailed physical evaluation and medical history assessment. Via hospital admissions and mortality reports, arrhythmia was diagnosed. Findings revealed that physically active people had a lower risk of AF and ventricular arrhythmias. There was no link between total or vigorous physical activity and bradyarrhythmias. Observational support was lent to the notion that physical activity is related to a decreased risk of atrial and ventricular arrhythmias.