I have had 5 periods of AF in 2017 and I have been able to stop all of them by getting on my bike and after about 15 mins to an hour of cycling, particularly if I have to go up a hill, I revert back to NSR. It is nice to have found a way to control things as it avoids the long-winded process of getting cardioverted. It has not always worked pre-2017 but was often effective. I had a cryoablation in July 2016 which obviously was not totally effective. I also have LBBB and cardiomyopathy which may be the cause of my AF. I use a sports heart rate monitor to when I am in AF and when cycling.