There are a lot of "factors" that go into one's return of testosterone. Age is one, length of time on ADT is another, pre-ADT testosterone may be another.

I can only provide my specific case. I was 61 when I started 18 months of ADT, last Lupron was May 18, so by July or August it was clearing my system. In October, T was 135, by Feb 19 it was above 400.

How much exercise should you do...whatever you want to. and whatever your health "allows" you to do. I have seen some hire personal trainers at their gyms to help guide them through developing an exercise program. i continued to exercise while on ADT albeit fatigued. After, I stayed with the same exercise, riding my bike, using the elliptical, swimming, playing basketball, skiing, waking, gardening, hiking in the mountains. The difference was with the return of my T, I was not so fatigued. That being said, an example of what I was able to do while on ADT was doing the Bataan Death March Memorial in White Sands, NM with my sister, a 26.2 mile hike through the desert. Not saying my time was great though, but I finished.

The testosterone recovery time varies widely with the individual and the longer you are on ADT (Lupron) generally the longer the recovery time. I am 78, have a Gleason score of 10 and have been on ADT for most of the past 9 years. If I were ever able to get off ADT it is unlikely that my T or stamina will ever recover. But I keep pushing. If you were on ADT for a year or more it is likely that it would take many months to rebound and possibly never get back to where you were. But keep at it and don’t get discouraged. You could be one of the lucky ones.