While I didn't have a port, I did have a PEG. It's admirable that you want to continue with your fitness regime however, for many including myself, the treatment hit me so hard that by the third week I pretty much hit the wall and exercise was out of the question. I can also tell you that for me stretching and even light physical activity such was a bit uncomfortable with the PEG sticking out of my belly. Definitely consult with your team concerning limitations.

Positive thoughts and prayers