CobaltBlue

Yes and no. I am a big fan of cardiac rehab. I had my heart attack and two stents placed in 2002, at age 35. Thanks to the exercise physiologist in there (we later became friends and did some exercise, e.g. "stadiums" outside of work hours), I was able to drop a bunch of weight and change my lifestyle. I started phase II in April 2002 and completed that in July 2002 (3 days per week monitored). My insurance covered 36 visits. After that is phase III here, which costs me $8 per visit because there is no insurance coverage. I go once per week, every Thursday. I will be leaving shortly to do this week's workout.

I suppose I could be fine without it now--I do run just about every single day. The nice thing about keeping up with rehab is not only the variety of exercise machines (like a gym) but more importantly, the records that are kept on you. If something changes, such as a decrease in exercise tolerance, or reproducible pain such as angina upon heavy exertion, they will have those records for you. This can potentially catch a problem, as Ninelives pointed out in her case.