Did you put yourself into afib by exercising? Or did you have irregular heartbeat even when not exercising? I am just running into this issue in the last month but feels like my heart's about to explode out of my chest for a long time after exercise and it won't come back down. Doesn't feel like normal when my hearts beating fast. How fast was your heart rate going in your recovery state? I ran into this today took about half hour the other day it took 2-3 hours, it all depends on how intense the exercise is. Did you find the more intense the exercise the longer your in afib? I find lifting weights causing it, however I went for a jog yesterday and no issues. Did your heart come back to a good resting rate after it calmed down?

Thanks for answering my questions!