Too much too soon?

The cardiologist was happy with Ken's progress last Thursday, and said he didn't need to see Ken until September, when he will do an echo-cardiogram to check on how his heart is going. That's if Ken hasn't worn it out first. Yesterday he mowed the lawns, and used the petrol blower to clean up the front yard and back yard path. I found him sitting on the steps gasping. "You silly bugger, you're supposed to take things slowly", I said crossly. A friend of ours who had open heart surgery a few years ago, said it was good that Ken is out there doing stuff, even if he does get tired. "At least he isn't lying around the house doing nothing at all, which would be far worse". Mmm. I suppose so.