Exercise is beneficial for everyone, as long as it is done properly for the person. I'd be hesitant to allow her to just jump in to a boot camp without some private training first.
Coumadin/warfarin are vicious drugs that kill people IMO. There are much better alternatives, however, getting people off that stuff while conventional medicine believes so much in them is tough. When I have patients come in on those meds, I'll be honest, I don't expect much in terms of health improvement. Good blood is necessary for all healing, and that drug makes for bad blood and a horrible quality of life.
Ask her about breast surgeries as well.