Vegard Malmo presented the poster “Aerobic interval training reduces the burden of atrial fibrillation”. The study shows that aerobic interval training for 12 weeks clearly reduces the burden of AF in symptomatic patients. It is followed by a significant improvement in VO2max, left atrial and ventricular function, cholesterol levels, and quality of life. Further studies are needed to evaluate the underlying mechanisms and the effect of exercise training for a longer period of time. The study was presented at the ESC Congress in Barcelona who was arranged August 30th to September 3d.