After having a procedure done whether it be open heart surgery, angioplasty, valve replacement etc, the question is how hard can I exercise? Depending on your procedure, exercise time may very. It really comes down to your doctors discretionon when you can resume moderate activity . However, once you have been given the green light on exercise, how hard can you really push yourself? In the back of most peoples minds is the worry of having the a heart attack come on again whic