Now I was age 39 back then and I was a very active person and avid weightlifter which I continued even during my treatments until week #7 (Radiation #30). Then it hit me like a ton of bricks.
Didn't start working out again for 5 weeks after that as I would even get tired going to my mailbox. Six weeks after that I went back to my job as I was out on short-term disability.
Hope this helps.

I am 67. I am 18 months after the end of treatment. My energy level is far below what it was before diagnosis. It is much better than it was right after treatment ended, but it is still sometimes discouraging.

It has taken me a while to be able to regulate my energy usage. I do some activity, then I rest. Then maybe some more activity, then I rest. If I know I have a big day coming, I make sure that I don’t do much the day before or after.

I have had struggles accepting the new me. In the past few months I have been seeing a counselor and it has really helped. I have been able to do the counseling remotely if needed. That may be possible for you guys.

Good wishes to you.