Hi Teresa,
When I was in treatment, I exercised daily - floor exercises, weights, recumbant bike. I also took walks with my wife (caregiver) daily.
Now, the flip side was that I did not work very hard at it - I didn't want to use up very many of those precious calories (that were so hard to maintain).
So, for me the exercise was a way to "keep moving", and like others said were a spirit boost - and I think had some (although probably not much) value as exercise.
Unfortunately, this did not help my bowels much and by the end of treatment I was horrifically stopped up.
Best wishes,
Chris