That is a great question, and I'd be very curious to hear the answer. I myself was diagnosed about six weeks ago, and I'm still very active. I play golf once a week, and try to remain as mobile as possible. They told me that golf was fine and shouldn't bother the portacath, but now I wonder if I shouldn't be asking my onc nurse to check it somehow with each (weekly) chemo treatment.
I'll keep you posted.
Mark