It's usually pretty easy to tuck the tubing into somewhere to keep it out of the way. I'm not a plumber, but I am pretty active and have yet to rip out a canula.
He could consider using a Spibelt to stash the pump. He could also cut a very small hole in his pocket and thread the tubing through the hole and stash his pump in his pocket.
In my experience with pumping, the vast majority of problems like this can usually be solved with a little ingenuity.