@eastmum it's different for everyone, I exercised before and after treatment, however when I worked with my Exercise Physiologist she said for me particularly..again not everyone, but for me she said she would not have worked with me through Chemo as its a time depletion and healing on a body level. I was very ill through chemo and had to learn to walk again, exercise would not have been an option at that point. I have kicked butt 3 yrs on now to where I was...a long way from normal and concede I am forever physically changed and no amount of exercise will get me there. But I feel GREAT! if you want to do anything I would only recommend walking or working with an exercise physiologist and building up slowly...that will get you great long term success. x