Russ

You will be just fine, I had my PaceMaker & Defribillator "installed" almost 9 years ago in November, and I am still going on, and yes, you must lay off the heavy lifting, some MODERATE exercise and try to eat healthy.
Actually, I have to make an appointment to see how is the Batery level.

And please, take it a little easier, slow down a little.

Manuel