Hi, I'm 59. My AF came on just over 6 weeks ago and has been persistent since then. Resting heart rate was around 50 and is now low 90s; max HR was 180 but without beta blockers will now rocket to over 200 with very little effort. I'm on 1.25mg of Bisoprolol and 20mg of rivaroxaban and am waiting for a cardioversion, hopefully in the next 4 weeks or so. I did an iron distance triathlon 2 weeks before the AF started and it came on at the end of a hot, hilly 100km bike ride in Mallorca. Possibly a perfect storm - not being fully recovered from ironman, dehydrated, fatigued and carrying a virus (I also developed cold sysmptoms the next day). Anyway, I've read lots and have found this forum useful but am struggling to get a clear view on training with AF. I hear the full spectrum from "don't do any exercise at all" to "do whatever you want/can". I can't hit the numbers I was doing before AF due to reduced cardiac output and the beta blockers limiting my heart rate but training still makes me feel good and I'd like to continue to try and maintain fitness. Are there any other endurance athletes out there with AF? I'd love to hear other people's advice and experience.