I am 50 year old with a lifelong history of, sometimes quite intense, exercise. Earlier this year my doctor found, inadvertently, that I had Atrial Fribulation. I am completely asymptomatic (but now paranoid). I have had one session of Cardioversion but it lasted only some 3 days which indicates there was no merit in a repeat session. I am on Warferin keeping my INR between 2 and 3.
What I want to know is what exercise I can do. I would like to continue running (up to and including marathons), cycling and swimming and was also considering taking up rowing. Advice please