Belatedly joining this thread.
I was diagnosed with breast cancer this time last year, and after surgery and radiotherapy, and an enforced "no upper body workouts, no cycling, no swimming, no kayaking, you can walk up to 5K per day" between last July and January, I have work to do. Oncology team have signed me off, and whilst the surgeon's 6-month consult has been buggered by CoVid, I'm carrying on as though everything's getting back to normal.
I'll probably post a new thread at some point, perhaps because I think we need to talk more about cancer - I'm still working out whether to do that or not, and this particular thread's not about that.
I wore out my first skipping rope between January and the end of March, heeding the idea of 'get fit to run, don't run to get fit,' and have now started staggering round the block. The attempt to get rid of the weight should help me for many reasons, not only because the fat and extra oestrogen are part of the problem.
So, I have a loop which measures 5.1km, which I'm currently doing as a run/walk combo two to three times a week. Gradually I'm increasing the run and reducing the walk, although I'm not using the Ct5K podcasts (I tried in the past and didn't find them great). I have a HRM and do the distance as a series of intervals, warm up for about 5 mins, then run until I ramp up to about 90% Max, sustain it as long as I can, then walk until I hit the lower end of threshold and do it again. The walks are becoming shorter.
Carry on all, just sticking my head up. I'm watching and learning.