My AF sometimes occurs after exercise. Tonight for example I take part in an orienteering event. I run for about 60mins; no AF. 50 minutes after exercise I eat my dinner (curry/rice) and whilst doing so I go into AF. Quite bizarre as on Saturday I ran for over 1& half hours on quite a hilly route and have no AF after? It can take about a week for NSR to return. When in AF my heart doesn't beat excessively fast just irregularly. 80-90 BPM. My resting heart is about 50BPM. Anyone else have anything similar. I'm going back to cardiologist later this month. Went to A&E last time and they put me on bisoporol which makes me feel tired and really suppresses my exercise performance. 2.5mg but I've halved the dose daily. Any thoughts comments or words of wisdom appreciated. Going to ask to see an electrophysiologist.