Hey!
All my exercise stopped worst luck as I progressed through Chemo, I was severely ill even after finishing FEC and going onto Taxol, I suffered nerve, bone and muscle pain that was cumulative. 9 months on, I can only manage a 30min walk even then, my legs and feet ache like mad with neuropathy in my toes. Everyone is different and I think there are alot of ladies who were successful at still exercising through treatment. I'd definitely discuss it with your Oncologist and most importantly be guided by your body, that will be your biggest indicator, give it a go and just see how you manage.
Melinda xo