@jimhealthy It 'might.' That's it...it might. Or not. It depends on your heart's overall condition, why it developed AF in the first place, how calm and back-to-normal it has returned if you have reduced whatever the stress was at the time, and how resistant it now is to whatever you propose to subject it to. In my case, I was able to run/walk for 20 km at a time until I began to slip into a higher burden and my EP agreed that it was time to nip it before it became persistent or worse. So, post diagnosis for me, and while still in the paroxysmal stage, I was able to almost do the normal stuff. However, I did notice that the metoprolol seemed, with nothing else to blame it on, the culprit in reducing my output. I just couldn't seem to return to the same speed and endurance. I told this to my cardio, but he insisted the metropolol could not be blamed. He added quickly that he very much encouraged his cardiac patients to not lose fitness...so to keep up what they had been doing if they were fitness freaks.

One other thought: if you have had a successful cardioversion and if it seems to have 'caught', meaning it is durable (many like myself have cardioversions that only work for hours!!), and you know for a fact that you don't have valvular problems, atrial or ventricular enlargement, and no other visible morphology changes, ......AND.........no blockages or ischemia, then I don't see why you shouldn't make a graduated attempt to restore your former athletic self. Just do, please, do this sensibly, patiently, methodically, and don't go out for a wall-to-wall blast the first time out because it feels great. You're still a heart patient.

Finally, your cardiologist is the first person whom you should ask about this.