My concerns about the intensity of exercise after stent procedure

Received a stent procedureI received a thorough exercise prescription and took the tests diligently. The exercises listed in the prescription do not include running. However, since I was exercising in this room alone, I felt the intensity was somewhat weak, so I voluntarily participated in running. As a result, many parts of the exercise intensity were appropriate. However, because I added it voluntarily, I am a bit worried about what kind of impact this might have. It should be okay to listen to my heart's opinion. Still, just in case, I am posting this all at once. My running speed isn't very fast either. I am determined to try my best.