I had quintuple bypass surgery at age 54, so I know what you mean about not trusting your heart! (They did 5 on me, piggybacked an extra graft so that it would stay open...) What really helped me regain the confidence to exercise is that they sent me to cardiac rehab. Find out if your insurance will pay, and if not, I'd say it is worth every penny to re-learn to exercise in a safe, controlled setting (they wired me with electrodes and recorded every session, with data about what machine, what my perceived exertion level was, etc., then not only did the nurse and exercise physiologist review it there on the spot, but they emailed the readings to the cardiologist's office to review. When I was done, I had the all-clear to exercise for 20 minutes at a time, and got lots of instructions about how to build it up gradually and wome warnings... no walking in extreme heat or humidity, that sort of thing. I joined a gym about a year after my surgery and now I do 45-60 minutes of cardio at a time and do strength training, too.
Hope you heal well... don't be afraid to call the doctor and get advice!
If I can stop one heart from breaking,
I shall not live in vain:
If I can ease one life the aching,
Or cool one pain,
Or help one fainting robin
Unto his nest again,
I shall not live in vain.
| current weight: 178.0