I am 65 years old fit in body and mind and had RP last july 2020.
Pre surgery, keep your self fit and active,physically and mentally, for me it really did help. Also do your pelvic floor exercises, again ,really helped me.
I had minimal pain, discomfort. I had catheter for 10 days. I was walking,steadily 3km after 3 days ,with no discomfort, just inconvenience of the catheter. Catheter removed again no discomfort.
I continued walking each day building my strength and positivity.
Early Sept I was anxious to run again. On a Friday morning I went for a jog, 3km, with pad in place. I completed my job,no issues, pain ,or leakage!!
I slowly built up my activities and Oct went back to work,as a sports coach. (Rugby and football). I have been careful in my approach but sm confident to run around a pitch and participate as I need to.
I partake in weekly circuit training classes and regularly use an exercise bike. ( after 12 weeks).
I am sure that you will regain your fitness if you are careful and prepare your body for surgery.
Most importantly, post surgery. Listen to your body. If it hurts,you are doing too much or something too early.
Nb. I hardly need pads now. !!!
All the best