Stomach exercises possible having a SPC?

I apologize if a thread already exists. If so, it illuded my search.

I have been an avid fitness junkie for twenty years prior to my AKA and subsequent SPC over 3 yrs ago. Any attempt to do traditional sit-ups has caused spirals of what appears to be tissue presumably a consequence of the catheter being scraped along my bladder during the contraction of the sit-up.

I was not given any reason for concern as my bladder is scoped annually. However, now realizing the prevalence of tumors with bladders incurring repetitive scraping of the tissue(or so I have read but not in the context of a controlled study etc. I’m anxious to get the best direction to any knowledge on the subject, and as well, I’d be sincerely appreciative!

Best regards!