There's nothing like researching things that are already known.
For many years cardiologists have been recommending exercise for heart patients recovering from myocardial infarction (heart attack) to aid the strengthening of the heart muscle though working it and to encourage revascularisation.
The problem arises getting the patients to do the exercising. The majority feel that making their heart do something strenuous will bring on another attack so they tend to sit around doing nothing and avoiding all exercise apart from breathing.
All major cardiac centres are already equipped with exercise clinics with gymnasia and apparatus designed to give the heart a good workout.
A cardiologist friend always recommends getting a dog as an important part of making a good recovery from heart attacks.