Oh I'm not expecting an instant attitude and lifestyle change. I'm just hoping he may get interested in exercising more, especially if he notices an improvement in his health and attitude towards life. It doesn't even have to be cycling. It could be something as simple as more walking.

"Weak heart" is his wording. I think he did have congestive heart failure because he was hospitalized a while back and has mentioned having "fluid in the lungs".

I would make sure it was okay with his doctor too. That's why I'm approaching this with extreme caution.

He has two new neighbors who are over 500 pounds, at least. I've seen one of them walking around and she is constantly out of breath. She even sounds breathess while speaking. It is scary to think that my two overweight friends could end up like this woman if things get out of hand.