I didn't go through chemo specifically, but I took an anti cancer drug regime that was pretty much a substitute for chemo. Mostly you will notice the energy levels. There are things the dr. can prescribe for it. But in my case she didn't want to. Also I had to deal with really bad nausea. But this drug I tok was only every three days, so I was able to predict after awhile the bad patches. I don't remember feeling up to full workouts back then, but I did run here and there just to clear my mind.
I would talk w/ your Dr. and see what he/she says. I would bet that as long as you feel up to it moderate exercise would be ok. In fact it might be good. Because it will help you mentally. And the mental componet is HUGE in recovery.