Gregory Marcus and Chris Wong, both from the University of California, discuss the development of the Harm to AF Lifestyle Risk Score and the importance of accurate prediction scores for atrial fibrillation. They explore lifestyle factors, such as diabetes and physical activity, that contribute to predicting AFib. The limitations of the study, including self-reporting of lifestyle factors, are discussed. The benefits and ease of use of the HARMS2-AF score in predicting AFib are highlighted.