In addition to the links I provided above, here’s a paper about the benefits of exercise to counteract the adverse effects of ADT —> https://journals.lww.com/acsm-msse/fulltext/2023/04000/resistance_exercise_training_increases_muscle_mass.2.aspx
I don’t run as much as I used to, but I still use an elliptical machine at the local gym - anything to keep things moving. At one point I enrolled in a water exercise class at the local Y - that form of resistance training helped keep the pressure off of the knees. Again, anything to keep things moving. No excuses.
Being a gym rat, I managed my own weightlifting and cardio regimen without the need for a personal trainer. Based on my tracking, along with a noticeable loss of muscle mass, I experienced an approximate 30% loss of strength. But, it never prevented me from engaging in any vigorous activities. As my strength dropped (due to the loss of testosterone), I had to reduce the weights I was lifting so as not to injure myself (muscles and joints) during that time. (Always listen to your body.) Setting expectations as to what’s possible while on ADT is important.
Despite being on Eligard at 65y, I pushed myself and swam in U.S. Masters and Senior Olympics events in my state in 2021. I didn’t make any world records(!), but I was competitive in my age bracket. More importantly, it kept me active and in shape while on Eligard. Never give up.
Just as most cancer centers have trained counselors to help men and their families get through the mental health aspect of prostate cancer, many have fitness programs to help men get through the physical and dietary aspects of prostate cancer and hormone therapy. Consider contacting them.
I do have to say that exercising is one of the few times during the day when I'm NOT ruminating about prostate cancer so even if it had no other benefits (and it does) that alone will compel me to keep doing it.