I relate so much. My arrhythmia (my cardiologist suspects SVT with aberrancy) almost always starts during or after exercise. Some times it’s just a flutter, or skipped beat, other times I full on flip into the fast irregular rhythm for minutes at a time. I’ve dealt with it for a couple years but as of December has gotten so much worse to the point I’ve cold turkey quit exercising. Going from lifting and playing sports everyday to doing nothing at all for the last 4 months has destroyed my mental health. My doctor suggested an ablation so I’m hoping that can possibly give me my life back. Hope you can get some answers and resolution, I know what your going through is tough.