my mother had raynauds and ended up having some portions of digits removed. she ended up dying at the hands of the medicos at age 61.
i had raynauds. my feet and hands turned purple. that went away when i oxygenated. i couldnt do aerobics(that is the best, as you pointed out) so i did oxygen therapy by drinking drops of food grade H2O2. my raynauds cleared right up when i started making Colloidal Silver and dumping that and H2O2 (Hydrogen-Peroxid) in a hot bath. my fingers and toes went from purple to pink almost instantly and they have never gone back. and now i can walk and ride bike and such so its no big deal.