Just some experience to share on athletic activity:
I have, for most of my adult life been a bicyclist. My ability to stay active varied over the years depending on other pressing issues in life.

After Covid came along in 2020, I started to focus on it again. So in the summer of 2022 following what I believed was an uneventful stress test, I had a call from my cardiologist urging me to come in promptly for an exam and what he described was ‘probably a stent’.
Instead he found a badly calcified bicuspid aortic valve…. Accompanied by what he described as ‘mild dilation’ (4.9 cm) of the aorta at the ascending arch.
Given the … apparent lack of concern over the dilation. I thought a TAVR to fix the valve looked really far preferable to open heart surgery.
An older surgeon saw me first and wanted to repair the artery.
A younger surgeon who had a lot of experience with TAVR’s felt the dilation (or aneurysm if you want to call it that) thought it was manageable. I did the TAVR on Friday and was driving and doing errands on the following Tuesday.
We agreed I would have regular exams on the condition of my aorta on at least an annual basis.
Although I felt fine, I was nervous going back to cycling.
I resumed it after about six months. At the annual exam, my aorta had actually shrunk (only a tiny amount to 4.8, but any is good). At two years, it was 4.6. After the second year of good measirements, I really have started putting my heart into cycling… no pun intended. I sprint and climb mountains… and my cardiologist cheers me on. At three years, my cardiologist thinks there was a measurement error… at 4.1. cm. Maybe so, but it certainly doesn’t seem to be getting worse.

I have, for the most part, quit worrying about exercising and the aneurysm at this point. I have some concern about how long my artificial valve will last… hammering it as I do. They are, however stackable.
My cardiologist says that keeping the heart strong by exercise improves the chances of surviving an event (I.e., heart attack) because the coronary arteries become cross-connected from athletic activity.