This is what a quick search for testosterone had to say:
" It has functions in almost all physical activity. It's what supports muscle, strength, and energy. Without it, you would not be able to function or work in the gym for any length of time or level of intensity."
I am assuming, that ADT is supposed to suppress your testosterone to near nothing as a way of stopping/slowing your PC.
Wish I could follow your advise and pump iron in a sweat shop, but our home borders on a hilly Provincial Park of 8000 acres which is where my tread mill training begins. That is when there is no snow. Winter, it is 6 days a week of skiing in one form or another. World cup cross country men and women do not look like "Arnie" although weight training is a big part of their life. You can look it up but these athletes are considered the most fit of all athletes. I am lucky that I don't live in a city with few outdoor activity options.
I may whine about
my muscle power and endurance deteriorating under ADT, but trailguy has it right, a strong heart, is the most important organ in your body for a long and active life.
Age =69, 12/12 psa=6.6, DRE, lump on prostate. 1/13 BX, 2 of the 8 core biopsies PCa, G=3+4=60%, 4+3=40% of tumor, CT=NEG, BS=NEG,CS= T3A N1. RRP with LN, 4/13. BX, 2mm in LN. 13 cc gland PSA= 2.8 6/13, PSA=3.1 12/13, PSA=2.82 3/18, PSA=1.17 6/18, PSMA PET scan 8/18= 2 presacral LN+ , 3 weeks Casodex 9/18, 6 months Lupron 9/18, 6 weeks RT 11/18https://daveincoldstream.blogspot.com