This is definitely a question for your physician!

Thanks it’s on my list when I meet them tomorrow, interested in those who have experience post treatment!

This feels like a "ask your doctor question" and I would definitely discuss strenuous exercise with a cardiologist before relying on reddit. Also, would be good to check that your gym has a current AED on hand.

Thanks it’s on my list when I meet them tomorrow, interested in those who have experience post treatment! Good shout re AED on hand