When I finished with rad and chemo, 5 cistplatin and 30 rads, I asked the RO for a prescription for PT. I was so weak, I could barely climb the stairs to my bedroom. I was so weak at first that I could not do 10 curls with 10 lb weights. I had no upper body strength and limited lower body.
I have been going 3x a week, working on eliptical for 10 mintues, 6 minutes on balance, weights for arms and chest and thigh machines.
I am probably back to being in better shape then before the diagnosis. I strongly suggest getting your treatment team to write a Rx for physical therapy as it seems to escalate the healing process.