Are there any cardiovascular exercises for the disabled?

Hello. My mother is an amputee and she is not wheelchair bound, she is about like your mother. I know that she has this exersiser that she peddles with her hands like a bike. She lifts weights.She uses resistance bands. She is on a semi vegetarian diet in which she includes eggs and fish. Mother has slimmed and there is no way she is going to a gym or installing big, expensive hoists in her home. Hope this helps. Good luck!