Hi, I would think you need to be a bit careful about rushing back into weight-bearing exercise. And perhaps moderate expectations of when you'll be able to get back into your previous exercise regime. After you have gone through surgery, you should consult with a physio or therapist who has experience in dealing with post-surgery patients. The reason I suggest being cautious is cause I have re-opened wounds from doing too much after surgery. I've had my post-mastectomy wound stitched up 3 times and its now set back physical recovery a bit. I've been advised to not do anything too strenuous for 6 months.
I had a physio visit me in hospital and provide exercises to do - which have been gentle stretches and building up some strength in arms etc.
I also had cording after my surgery which also affected my ability to do strenuous exercise with my arm.
So walking, walking and more walking has been the best thing - while being patient and letting the body heal. And then of course you may also find lower energy levels due to chemo.
Sorry if that's a bit negative but I think just be prepared that your body will need more time to heal after surgery and you should be prepared to not push yourself too hard.
Cheers, Anne
