Shelly,
Thanks for the post.
Unfortunately, the chance of recurrence of fluttering depends on what it was that was ablated (and on who did the ablation!).
If you now have episodes of fluttering that are similiar to the symptoms prior to the ablation, then recurrence is certainly a possibility and needs to be evaluated. I would make an appointment to see the doctor, and I would do it prior to returning to the gym.
Hope that helps.
Thanks.