I agree @Sister I lost full condition and muscle mass due to treatment, I had a long recovery back to the land of living, was it because I wasn't fit? No, I was, my body didnt cope with treatment. Radiation aggravated a dormant heart condition I had in 2012 and had an ablation done, best thing ever. But then a recurrence in 2015?? I worked so hard with my Exercise Physiologist in 2016/17 and Im very active now. I feel the best I have been in 3yrs having said that I am back working full time which is very difficult but great!!!. So it has been the best thing doing Exercise, there's no doubt with any of that or how much I did prior to 1st diagnosis...but that is VERY different @Sister to doing it for prevention. We should just be talking of the benefits of Exercise period. Hugs xo