I was 5 years older than you and in very good health going into it. It was a full year before I was back to 80% of what I could accomplish pre Tx. Everyone has different experiences with their response to treatment. Some have even driven themselves to all of their RT treatments and went back to work several weeks, post Tx, but they are certainly the minority. I'm not trying to be a downer here - just tell you that the post Tx phase is very unpredictable. The majority of us continued with radiation reaction issues up to 3 weeks post Tx so I am curious why your doc feels you will be back in the gym in 3 weeks.

I have always felt one has to plan for the worst and hope for the best. Take it one day at a time.