RT Journal Article SR Electronic A1 Nichols, Emma Hitt T1 CARDIO-FIT JF MD Conference Express YR 2015 FD SAGE Publications VO 15 IS 22 SP 9 OP 10 DO 10.1177/1559897715598277 UL http://mdc.sagepub.com/content/15/22/9.abstract AB The prospective CARDIO-FIT study shows that a structured exercise program that results in gains in cardiorespiratory fitness significantly improves freedom from atrial fibrillation and arrhythmia-free survival among obese patients with atrial fibrillation. In addition, weight loss with or without improvement in cardiorespiratory fitness improves freedom from atrial fibrillation and arrhythmia-free survival.