The difficulty we had with the cardiac classes and continually since is that no one takes into account any other problems the patient had.
DH had a heart attack about 5 years ago. The hospital gave him an antibiotic resistance infection while doing the bypass surgery that left him semi conscious for 6 weeks with tubes everywhere especially in one of his lungs . He had to have further operations and his breast bone is split and out of alignment and he is in constant pain.
Despite this all the cardiac rehabilitation takes no account of the fact that the lung damage means he has breathing problems and cannot walk any distance, cannot go out walking in very cold weather, nor the debilating effect of the permanent pain in his chest.
Even now, he is under the care of the local heart failure clinic, at every check up they ask about exercise and we, or rather I have to explain his limitations. in fact he does quite a lot of exercise indoors. he is an inveterate DIYer and with a recent house purchase that needs work, he spend most days wandering round the house doing small DiY jobs, which require step stools, no ladders, tools, visits to walk round B&q.
But we wish the cardiac people would look outside their boxes and realise that people with cardiac problems often have other problems that interact and limit the kind of rehabilitation they can do.